Health Calculators

Addiction Calculator

Screen substance use symptoms and estimate DSM-5 severity

Alcohol Unit Calculator

Estimate alcohol content and standard servings from beverage strength

Audit Score Calculator

Assess alcohol use risk using the standardized AUDIT questionnaire

Audit-C Calculator – Am I an Alcoholic?

Screen alcohol use and identify possible risky drinking patterns.

BAC Calculator (Blood Alcohol Content)

Estimate blood alcohol concentration from weight, drinks, strength, and time.

Caffeine Calculator

Estimate daily caffeine intake and recommended personal limits

CAGE Questionnaire Calculator

Screen alcohol use concerns using four standardized CAGE questions

Cigarette Calculator

Estimate cigarette consumption, nicotine exposure, smoking costs, and pack-years

CIWA Calculator

Assess alcohol withdrawal severity using the standardized CIWA-Ar score

DUDIT Calculator

Screens drug use patterns and indicates possible drug-related problems

EtG Calculator

Estimate alcohol exposure and EtG detection timing after drinking

Fagerstrom Test for Nicotine Dependence Calculator

Assess nicotine dependence using six standardized smoking behavior questions

Finnegan Score Calculator

Assess neonatal withdrawal severity using the modified Finnegan scoring system

HSI Calculator — Heaviness of Smoking Index

Estimate smoking dependence from daily cigarettes and morning timing

Pack Year Calculator

Estimate cumulative tobacco exposure from daily smoking history

Smoking Recovery Calculator

Track health, financial, and exposure benefits after quitting smoking

Sobriety Calculator

Track elapsed sobriety and recovery progress accurately

Standard Drink Calculator

Estimate alcohol content and regional standard drink equivalents

BAC Tool

Estimate blood alcohol concentration, clearance time and drink intake.

ACFT Calculator

Calculate ACFT event scores, total points, and pass status accurately.

AFT Calculator — US Army Fitness Test

Estimate Army Fitness Test event scores, totals, and pass status

Air Force PT Calculator

Estimate Air Force fitness scores, standards, and pass status quickly

APFT Calculator

Estimate Army fitness scores, totals, and passing status quickly

Army Body Fat Calculator

Estimate Army body fat percentage and age-based compliance status

Navy Body Fat Calculator

Estimate body fat percentage using Navy circumference measurements

Navy PRT Calculator

Estimate Navy PRT event scores and overall fitness performance

BMI Calculator for Kids

Calculate child BMI, percentile, and healthy weight category accurately

BMI Calculator for Men

Calculate male body mass index and interpret healthy weight categories

BMI Calculator for Teens

Estimate teen BMI, percentile, and healthy weight category accurately

BMI Calculator for Women

Estimate body mass index and healthy weight range for women

BMI Calculator – Body Mass Index

Calculate body mass index, health category, and healthy weight range

BMI Weight Loss Calculator

Estimate BMI, healthy weight range, weight loss, and calorie targets.

Geriatric BMI Calculator

Estimate body mass index and age appropriate health categories

ABSI Calculator

Estimate body shape mortality risk using waist, height, and weight

Adjusted Body Weight Calculator

Estimate adjusted weight using height, sex, and actual weight

BAI Calculator - Body Adiposity Index

Estimate body fat percentage using height and hip circumference

Bedridden Patient Height Calculator

Estimate stature from knee height for bedridden adult patients

Body Fat Calculator

Estimate body fat percentage, BMI, fat mass, and lean mass

Body Frame Size Calculator

Estimate body frame category using height, wrist circumference, and sex

Body Shape Calculator

Identify your body shape using bust, waist, and hip measurements

BRI Calculator — Body Roundness Index

Estimate body roundness from waist circumference and height measurements

BSA Calculator – Body Surface Area

Estimate body surface area from height and weight clinically

Draw Length Calculator

Estimate archery draw length accurately from your wingspan measurement

Face Shape Calculator

Identify your face shape from four simple facial measurements

FFMI Calculator (Fat-Free Mass Index)

Estimate lean mass and normalized muscularity from body measurements

Ideal Weight Calculator

Estimate ideal body weight and healthy weight ranges from height.

Karvonen Formula Calculator

Estimate personalized training zones from age and resting heart rate

Lean Body Mass Calculator

Estimate lean body mass from essential body measurements

Overweight Calculator

Estimate BMI, weight category, and healthy weight range accurately

Ponderal Index Calculator

Calculate ponderal index from body weight and height

RFM Calculator (Relative Fat Mass)

Estimate relative body fat from height, waist, and sex

Skinfold Body Fat Calculator

Estimate body fat percentage using seven-site skinfold measurements

Waist to Height Ratio Calculator

Measure waist-to-height ratio for practical body proportion health screening.

Waist to Hip Ratio Calculator

Calculate waist-to-hip ratio for body shape and health screening

Weight Loss Percentage Calculator

Measure percentage and amount of weight lost between weigh-ins

Anorexic BMI Tool

Check body mass index with visual adult reference ranges.

Army Body Fat Tool

Assess Army waist-to-height standards and historical body fat estimates.

BMI Tool

Calculate adult BMI, healthy weight ranges and target weights.

Body Fat Tool

Estimate body fat, lean mass and target weight easily.

Body Surface Area Tool

Estimate body surface area using five established formulas.

Body Type Tool

Explore body shape, frame size and composition estimates.

Healthy Weight Tool

Estimate healthy weight ranges, BMI and personal weight targets.

Ideal Weight Tool

Compare ideal weight estimates, BMI ranges and current measurements.

Lean Body Mass Tool

Estimate lean mass, body fat and composition proportions.

Overweight Tool

Assess adult BMI, waist measures and weight goals visually.

6 Minute Walk Test Calculator

Estimate walking performance, predicted distance, pace, intensity, and calories

ABI Calculator (Ankle-Brachial Index)

Compare ankle and brachial pressures to assess peripheral arterial disease.

Aortic Valve Area Calculator

Estimate aortic valve area using echocardiographic continuity equation measurements

Arterial Age Calculator

Estimate vascular aging and cardiovascular risk from key health factors

Blood Pressure Calculator

Assess blood pressure readings and cardiovascular pressure indicators

Cardiac Index Calculator

Determine cardiac index from cardiac output and body surface area

Cardiac Output Calculator

Calculate cardiac output from heart rate and stroke volume

Cerebral Perfusion Pressure Calculator

Estimate mean arterial pressure and cerebral perfusion pressure accurately

CHA2DS2-Vasc Calculator

Estimate atrial fibrillation stroke risk using clinical risk factors

CVD Risk Calculator – Cardiovascular Disease 10-year Risk

Estimate your 10-year risk of cardiovascular disease accurately

DAPT calculator

Estimate dual antiplatelet therapy benefit versus bleeding risk

Doppler Echo Cardiac Output Calculator

Estimate cardiac output using Doppler echocardiography measurements and heart rate

Duke Treadmill Score Calculator

Assess coronary risk from exercise test performance and symptoms

ECG Boxes to Seconds Calculator

Convert ECG box counts into accurate elapsed tracing time

ECG Heart Rate Calculator

Calculate heart rate from ECG R-R interval measurements

Ejection Fraction Calculator

Calculate ejection fraction, stroke volume, and ventricular emptying

EROA - Mitral Regurgitation Calculator

Estimate effective regurgitant orifice area and mitral regurgitant volume

Framingham Risk Calculator

Estimate your ten-year cardiovascular disease risk using clinical factors

Gorlin Formula Calculator

Estimate valve area using cardiac output and pressure gradients

GRACE Calculator

Estimate acute coronary syndrome mortality risk using GRACE scoring

Gupta Risk Calculator

Estimate perioperative myocardial infarction or cardiac arrest risk before surgery.

HAS-BLED Calculator

Estimate bleeding risk using nine established HAS-BLED clinical factors

Heart Failure Life Expectancy Calculator

Estimate heart failure survival using clinical risk factors and characteristics.

HEART Score Calculator

Estimate acute coronary syndrome risk using five HEART score components

ICH Volume Calculator

Estimate intracerebral hemorrhage volume using the ABC/2 method

LV Calculator

Calculate left ventricular structure, function, mass, and cardiac performance

MAP Calculator (Mean Arterial Pressure)

Calculate mean arterial pressure from systolic and diastolic readings

Mitral Valve Area Calculator

Estimate mitral valve area using established echocardiographic methods

Padua Score Calculator

Assess hospitalized patients’ venous thromboembolism risk using validated criteria

PERC Calculator - Pulmonary Embolism Rule-Out Criteria

Assess pulmonary embolism risk using eight validated bedside criteria

PISA Calculator

Estimate regurgitant flow, effective orifice area, and volume

PVR Calculator - Pulmonary Vascular Resistance

Calculate pulmonary vascular resistance from key hemodynamic measurements

QTc Calculator

Calculate corrected QT intervals using four widely accepted formulas

Rate Pressure Product Calculator

Calculate myocardial workload using heart rate and systolic pressure

RCRI Calculator

Estimate perioperative cardiac risk using six RCRI predictors

Revised Geneva Score Calculator for Pulmonary Embolism

Assess pulmonary embolism likelihood using validated clinical prediction criteria

Stroke Volume Calculator

Estimate stroke volume, ejection fraction, and cardiac output

TIMI Score Calculator for UA/NSTEMI

Estimate short-term risk in unstable angina and NSTEMI

TIMI Score for STEMI Calculator

Estimate STEMI mortality risk using eight validated clinical risk factors

Wells Score Calculator for Pulmonary Embolism

Estimate pulmonary embolism probability using validated Wells clinical criteria

GFR Tool

Estimate kidney filtration and explore clinical GFR categories.

Sleep Tool

Estimate sleep duration, efficiency, schedules and daily shortfalls.

Biden’s Vaccine Plan Calculator

Estimate vaccination needs, timelines, and progress toward Biden’s plan.

COVID-19 Vaccine Production Calculator

Estimate vaccine doses, vials, batches, timelines, and population coverage.

Vaccine Efficacy Calculator

Estimate protection using infection outcomes among vaccinated and unvaccinated groups

Vaccine Queue Calculator for Australia

Estimate COVID-19 vaccination timing across Australia using queue capacity.

Vaccine Queue Calculator for Canada

Estimate Canadian vaccine queue position, waiting time, and vaccination dates

Vaccine Queue Calculator for England

Estimate England COVID-19 vaccination queue position and waiting time

Vaccine Queue Calculator for India

Estimate vaccination waiting time and appointment date in India

Vaccine Queue Calculator for Ireland

Estimate your COVID-19 vaccination queue position and dates in Ireland

Vaccine Queue Calculator for Malaysia

Estimate Malaysian vaccine waiting times and vaccination completion dates

Vaccine Queue Calculator for Northern Ireland

Estimate Northern Ireland COVID-19 vaccination queue position and timing

Vaccine Queue Calculator for Scotland

Estimate vaccination waiting time using queue size and capacity

Vaccine Queue Calculator for South Africa

Estimate South African vaccine queue waiting time and appointment date

Vaccine Queue Calculator for the Netherlands

Estimate Dutch COVID-19 vaccination waiting time and completion date

Vaccine Queue Calculator for the Philippines

Estimate vaccination queue position and expected appointment timing in Philippines

Vaccine Queue Calculator for the UK

Estimate UK COVID-19 vaccination queue position and appointment dates

Vaccine Queue Calculator for Wales

Estimate Welsh COVID-19 vaccination waiting times and appointment dates

A1c Calculator – Hemoglobin A1c to Average Blood Sugar

Convert hemoglobin A1c into estimated average blood sugar levels

Blood Sugar Converter

Convert blood glucose values between commonly used measurement systems

Diabetes Risk Calculator

Estimate type 2 diabetes risk using established lifestyle and health factors

Diabetic Ketoacidosis Calculator

Assess DKA severity using essential metabolic and clinical measurements

Estimated Average Glucose Calculator

Estimate average glucose from glycated hemoglobin for diabetes management

Glycemic Index Calculator

Estimate glycemic load and classify food glycemic impact

Glycemic Load Calculator

Estimate glycemic load from carbohydrates, fiber, and glycemic index

HOMA-IR Calculator — Insulin Resistance

Estimate insulin resistance from fasting glucose and insulin levels

Insulin Dosage Calculator

Estimate basal, carbohydrate, correction, and mealtime insulin dose requirements

QUICKI Calculator

Estimate insulin sensitivity from fasting glucose and insulin levels

Warsaw Method Calculator

Estimate immediate and extended insulin for mixed meals

Added Sugar Intake Calculator

Estimate added sugar limits, calories, percentages, and remaining allowance

BEE Calculator

Estimate basal energy expenditure from age, sex, height, and weight.

BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation)

Estimate daily resting energy needs using Mifflin St Jeor

Calorie Calculator

Estimate daily calories using age, body measurements, activity, and goals

Calorie Deficit Calculator

Estimate calorie needs, sustainable deficits, and expected weekly weight loss.

Calorie Intake Calculator (Simple)

Estimate daily calories from body measurements and activity

Carb Calculator (Carbohydrates)

Calculate daily carbohydrate needs and balanced meal portions

Diet Risk Score Calculator

Estimate dietary risk from eating patterns and nutrition habits

DRI Calculator

Estimate daily energy, macronutrient, hydration, and micronutrient recommendations.

EER Calculator — Estimated Energy Requirement

Estimate daily energy needs using age, body size, sex, activity

Fat Intake Calculator

Estimate daily fat needs from calories and target percentage

Fiber Calculator

Estimate daily fiber needs and assess current intake

Gastric Sleeve Weight Loss Calculator

Estimate expected weight loss and postoperative weight after sleeve surgery

Harris-Benedict Calculator (Basal Metabolic Rate)

Estimate resting metabolism and daily calorie needs using Harris-Benedict

IIFYM Calculator (If It Fits Your Macros)

Calculate personalized calories and macronutrient targets for flexible dieting

Katch-McArdle Calculator

Estimate resting metabolism, lean mass, and daily calorie needs

Keto Calculator

Calculate personalized keto calories and macronutrient targets

Macro Calculator

Estimate calories and macronutrients for personalized nutrition goals

Maintenance Calorie Calculator

Estimate daily calories needed to maintain your current weight

Meal Calorie Calculator

Calculate total meal calories and detailed macronutrient distribution

Micronutrient Calculator

Estimate daily vitamin and mineral requirements for personalized nutrition planning

Net Carbs Calculator

Calculate net carbohydrates after fiber and sugar alcohol deductions

Protein Calculator

Estimate daily protein needs for fitness, health, and nutrition

Quarantine Activity Calculator

Estimate calories burned and energy needs during quarantine activities

RMR Calculator - Resting Metabolic Rate

Estimate daily resting energy needs from personal measurements

Sodium in Salt Calculator

Convert salt quantities into sodium content and daily value.

TDEE Calculator - Total Daily Energy Expenditure

Estimate daily calorie needs for maintenance and planning

Vitamin A Calculator

Estimate vitamin A intake, adequacy, daily value, and safety limits.

Vitamin Calculator

Estimate recommended daily intake for essential vitamins

Vitamin D Calculator

Estimate vitamin D intake recommendations, limits, and coverage percentages.

Weight Gain Calculator

Estimate calories, macros, and projected progress for healthy weight gain

Weight Watchers Points Calculator

Estimate Weight Watchers points from nutritional information per serving

APRI Calculator

Estimate liver fibrosis risk using AST and platelet values

Ast Alt Ratio Calculator

Calculate the AST to ALT ratio for liver enzyme comparison

CDAI calculator (Crohn's Disease Activity Index)

Assess Crohn's disease activity using standardized clinical measurements

Child Pugh Calculator

Assess cirrhosis severity using five established clinical parameters

FIB-4 Calculator

Estimate liver fibrosis risk using routine laboratory results

Lille Score Calculator

Estimate alcoholic hepatitis treatment response using validated Lille criteria

Maddrey's Discriminant Function Calculator

Assess alcoholic hepatitis severity using liver function measurements

MELD Calculator (Model for End-Stage Liver Disease)

Estimate liver disease severity and short-term mortality using laboratory results.

NAFLD Fibrosis Score Calculator

Estimate liver fibrosis risk using clinical and laboratory measurements

Adderall Dosage Calculator

Estimate prescribed daily, weekly, and course Adderall amounts safely

Aleve Dosage Calculator

Estimate Aleve dose, daily limits, intervals, and treatment totals

Benadryl Dosage Calculator

Estimate labeled diphenhydramine doses, product amounts, and daily limits.

Benzodiazepine Conversion Calculator

Estimate benzodiazepine dose equivalents using standardized diazepam reference values

Carboplatin Calculator

Estimate carboplatin dose using target exposure and renal function

Cefdinir Dose Calculator

Estimate cefdinir doses, schedules, course totals, and suspension volumes

Dosage Calculator

Estimate medication doses, volumes, daily totals, and treatment quantities

Drug Half-Life Calculator

Calculate drug half-life, elimination rate, and remaining concentration

Fish Oil Calculator

Estimate daily fish oil capsules and omega-3 intake

Gabapentin Dosage Calculator

Estimate renal-adjusted gabapentin dosing ranges for adult patients

Hydroxychloroquine Dose Calculator

Estimate hydroxychloroquine daily, per-dose, tablet, and course amounts

Isotretinoin Dose Calculator

Estimate daily, cumulative, and target isotretinoin treatment dosing needs

IVIG Dose Calculator

Calculate IVIG doses, volumes, and complete treatment requirements

Levothyroxine Dosage Calculator

Estimate levothyroxine replacement dosage using weight-based clinical dosing.

Lidocaine Dose Calculator

Estimate lidocaine dose and injection volume from patient weight

Local Anesthetic Calculator

Estimate maximum anesthetic dose and volume using patient weight

mcg to IU Converter

Convert nutrient quantities into accurate substance-specific international units

Medicine 3 Times a Day Calculator

Estimate per-dose amounts, timing, and course totals for medicines.

Melatonin Dosage Calculator

Calculate planned melatonin amounts for nightly and course use

MME Calculator

Estimate daily and total morphine milligram equivalents accurately

Opioid Conversion Calculator

Estimate oral morphine equivalents from common opioid dosing information

Peptide Calculator

Calculate peptide concentration, dosing volume, syringe units, and totals

Prescription Refill Calculator

Estimate medication supply duration and upcoming refill dates

Steroid Conversion Calculator

Convert corticosteroid doses across commonly used equivalent medications

tPA Calculator – Stroke Dosing

Calculate stroke thrombolysis dose, bolus, infusion, and administration duration

Tramadol Dosage Calculator

Estimate prescribed tramadol totals, daily exposure, and weight-adjusted dosing.

Tylenol Dosage Calculator

Estimate safe Tylenol doses using weight and concentration

Tylenol Overdose Calculator

Estimate acetaminophen exposure against weight-based overdose thresholds and daily limits

Warfarin Dosing Calculator

Estimate clinician-directed weekly and daily warfarin dose adjustments safely

Acid Base Calculator

Assess acid-base balance, anion gap, compensation, and disorders

Anion Gap Calculator

Estimate standard and albumin-corrected anion gaps from electrolyte values

Arterial Blood pH Calculator

Estimate arterial pH from bicarbonate and carbon dioxide levels

Bicarbonate Deficit Calculator

Estimate bicarbonate replacement needs from body weight and laboratory values

Corrected Calcium Calculator

Adjust serum calcium measurements for abnormal albumin levels

Corrected Magnesium Calculator

Adjust serum magnesium for albumin levels to estimate corrected concentration.

Drip Rate Calculator

Calculate infusion rates, drops per minute, and total delivered volume

Drops Per Minute Calculator

Calculate intravenous drip rates accurately from volume, time, and tubing.

Free Water Deficit Calculator

Estimate free water deficit from sodium and body weight

IV Flow Rate Calculator

Calculate IV infusion rates, drip rates, and administration timing accurately

Parkland Formula Calculator

Estimate burn resuscitation fluids, timing, volumes, and infusion rates

Plasma Osmolality Calculator

Estimate plasma concentration from sodium, glucose, and BUN levels

Serum Osmolality Calculator

Estimate calculated serum osmolality from three key laboratory measurements

Sodium Change Calculator in Hypertriglyceridemia

Estimate corrected sodium and sodium change from elevated triglycerides

Sodium Correction Calculator

Estimate corrected sodium during hyperglycemia using measured sodium and glucose.

Sodium Correction Rate Calculator for Hypo- and Hypernatremia

Estimate safe sodium change and correction rates over time

Sodium Deficit Calculator

Estimate total body water and sodium replacement needs safely.

Total Body Water Calculator

Estimate total body water from essential personal measurements

Urine Anion Gap Calculator

Estimate urinary ammonium excretion using urine electrolyte concentrations

Venous Blood pH Calculator

Estimate venous blood pH from bicarbonate and carbon dioxide values

Water Intake Calculator

Estimate personalized daily hydration needs for activity and climate

Winters' Formula Calculator

Estimate expected respiratory compensation during metabolic acidosis assessment and interpretation

Coronavirus Protection - Swiss Cheese Model

Estimate layered coronavirus protection and remaining infection risk

COVID-19 Mortality Risk Calculator

Estimate COVID-19 death risk using demographic and clinical factors

Denver HIV Risk Score Calculator

Estimate undiagnosed HIV risk using clinical prediction factors

Event Risk Calculator - Coronavirus

Estimate coronavirus event exposure risk from prevalence and attendance

Hand Sanitizer Calculator - Coronavirus

Calculate ingredients for effective alcohol-based hand sanitizer formulations

Incidence Rate Calculator

Calculate incidence rates and cumulative disease occurrence accurately

Infectious Disease and Epidemic Calculator (SIR Model)

Model epidemic spread, infection peaks, recovery, and population outcomes

Mask vs. No Mask Calculator

Compare infections, hospitalizations, deaths, and benefits with masks

Max Vaccine Immunity Calculator

Estimate maximum vaccine immunity and herd protection requirements

Mortality Rate Calculator

Estimate annualized mortality rates from deaths and population data

NNT Calculator

Estimate treatment benefit using event rates and absolute risk reduction

Reopening Calculator – Coronavirus

Assess outbreak trends, healthcare capacity, testing, and reopening readiness

Social Distancing Calculator - Coronavirus

Estimate safe occupancy and spacing for shared indoor spaces

Alzheimer’s Life Expectancy Calculator

Estimate Alzheimer’s survival using clinical and functional factors

Barthel Index Calculator

Assess activities of daily living independence using ten functional tasks

BIMS Calculator – Brief Interview for Mental Status

Assess cognitive status using the standardized BIMS scoring method

Braden Score Calculator

Assess pressure injury risk using six Braden scale factors

Charlson Comorbidity Index Calculator

Estimate age-adjusted comorbidity burden and long-term survival risk

Frailty Index Calculator

Estimate frailty burden from thirty health and functional deficits

Morse Fall Scale Calculator

Assess fall risk using six standardized clinical assessment factors

Osteoporosis Risk Calculator

Estimate ten-year fracture risk using clinical risk factors and BMD.

Tinetti Calculator

Assess balance, gait, mobility, and fall risk using POMA

BBT Calculator | Basal Body Temperature

Estimate ovulation timing and temperature rise from basal readings

Birth Control Calculator

Estimate contraceptive effectiveness, pregnancy risk, and protection over time.

Bishop Score Calculator

Assess cervical favorability and induction readiness during labor.

Breast Cancer Recurrence Risk Calculator

Estimate late recurrence risk using age, tumor size, nodes, grade

Breast Cancer Risk Calculator

Estimate five-year and lifetime breast cancer risk from personal factors

Breastfeeding Calorie Calculator

Estimate daily energy needs and breastfeeding calories for lactating mothers

Chances of Having Twins Calculator

Estimate twin pregnancy likelihood using age, history, and conception factors

Clomid Ovulation Calculator

Estimate ovulation, fertile days, and timing during Clomid treatment

Conception Calculator

Estimate ovulation, fertile days, conception timing, and due date

Crown-rump Length Calculator

Estimate pregnancy age and due date from ultrasound crown-rump length

Due Date Calculator

Estimate pregnancy due dates using menstrual timing and cycle length

EDD Calculator - Estimated Date of Delivery

Estimate your pregnancy due date from last menstrual period

Egg Freezing Calculator

Estimate eggs, cycles, and embryo potential for future fertility planning

Fertility by Age Calculator

Estimate age-related conception chances and reproductive fertility indicators

Flange Size Calculator

Estimate ideal breast pump flange size from nipple measurement

Fundal Height Calculator

Compare measured pregnancy growth with expected fundal height ranges

Gestational Age Calculator

Estimate pregnancy progress, due date, trimester, and conception date

hCG Levels Calculator

Estimate hCG changes, rise rates, and doubling time

Implantation Calculator

Estimate implantation timing from menstrual cycle details

IVF Due Date Calculator

Estimate your pregnancy due date from embryo transfer details

Luteal Phase Calculator

Measure luteal phase duration and interpret menstrual cycle timing

MCA Calculator

Calculate fetal middle cerebral artery Doppler indices and MoM

Mean Sac Diameter Calculator

Estimate mean sac diameter and early pregnancy gestational age

Nuchal Translucency Calculator

Assess nuchal translucency measurements and prenatal screening context

Ovulation Calculator

Estimate ovulation, fertile days, and next period dates accurately

Pearl Index Calculator

Estimate contraceptive failure using pregnancies and exposure duration

Period Calculator

Predict periods, ovulation, fertile windows, and pregnancy due dates

Pregnancy Test Calculator

Estimate pregnancy test timing from menstrual cycle dates

Pregnancy Weight Gain Calculator

Estimate healthy pregnancy weight gain ranges and progress.

Progesterone to Estrogen Ratio Calculator

Compare progesterone and estrogen concentrations for hormonal assessment

Reverse Due Date Calculator

Estimate conception, menstrual, implantation, and pregnancy milestone dates quickly.

Sperm Analysis Calculator

Interpret semen parameters and estimate clinically useful sperm counts

Stillbirth Risk Calculator

Estimate stillbirth risk using pregnancy timing and key maternal factors.

Testosterone to Estradiol Ratio Calculator

Compare testosterone and estradiol levels using standardized ratio calculations

VBAC Calculator (Vaginal Birth After Cesarean Section)

Estimate VBAC success likelihood using maternal and obstetric history

VTE Risk Score Calculator in Pregnancy

Estimate pregnancy-associated venous thromboembolism risk using clinical factors

4T Score Calculator | HIT

Estimate pretest probability of heparin-induced thrombocytopenia using four clinical criteria.

Absolute Eosinophil Count Calculator

Estimate absolute eosinophils from white blood cell count and percentage

Absolute Lymphocyte Count Calculator

Calculate absolute lymphocyte count from white blood cell results

Absolute Reticulocyte Count Calculator

Calculate absolute reticulocyte counts from red blood cell measurements

Age-Adjusted D-dimer Calculator

Calculate age-adjusted D-dimer thresholds for thromboembolism evaluation

Albumin Globulin Ratio Calculator

Calculate globulin levels and albumin-to-globulin ratio from proteins

Allowable Blood Loss Calculator

Estimate maximum blood loss before reaching target hematocrit

ANC Calculator without Bands

Estimate absolute neutrophil count using white blood cells and neutrophils

ANC Calculator — Absolute Neutrophil Count

Estimate absolute neutrophil count from white blood cell differential

Blood Donation Due Date Calculator

Estimate your next eligible blood donation date accurately

Blood Donor Calculator

Estimate blood volume, donation capacity, and basic donor eligibility

Blood Type Calculator

Predict possible child blood types from both parents’ blood groups

Blood Volume Calculator

Estimate circulating blood volume using sex, height, and weight

Corrected Reticulocyte Count Calculator

Adjusts reticulocyte percentage for patient hematocrit and anemia severity

DIC Syndrome Calculator

Calculate ISTH disseminated intravascular coagulation diagnostic scores

Diffuse Large B-cell Lymphoma Prognosis Calculator

Estimate NCCN-IPI risk and five-year survival for newly diagnosed DLBCL

Fresh Frozen Plasma Dose Calculator

Estimate fresh frozen plasma volume and units from dosing weight

Hematocrit to Hemoglobin Ratio Calculator

Compute hematocrit to hemoglobin ratio for clinical interpretation

INR Calculator

Calculate International Normalized Ratio from prothrombin time measurements

Iron Deficiency Calculator

Estimate elemental iron replacement needs from weight and hemoglobin values

Mentzer Index Calculator

Estimate thalassemia trait versus iron deficiency from blood indices

MIPI Calculator (Mantle Cell Lymphoma International Prognostic Index)

Estimate mantle cell lymphoma prognosis using validated clinical risk factors

mmol/L to mg/dL Calculator

Convert laboratory concentrations from mmol/L to mg/dL accurately

NLR Calculator

Calculate NLR from neutrophil and lymphocyte counts for clinical assessment

Plasma Volume Calculator

Estimate plasma volume from sex, height, weight, and hematocrit

RBC Indices Calculator | What is MCHC?

Calculate MCV, MCH, and MCHC from complete blood count values

Transferrin Saturation Calculator

Estimate iron availability from serum iron and TIBC values

Alvarado Score Calculator

Assess appendicitis risk using eight clinical assessment criteria

APACHE II Calculator

Assess ICU illness severity and estimate hospital mortality risk

GCS Calculator (Glasgow Coma Scale)

Assess consciousness using eye, verbal, and motor responses.

ICH Score Calculator

Estimate intracerebral hemorrhage severity and short-term mortality risk

Injury Severity Score Calculator

Calculate trauma severity from regional Abbreviated Injury Scale ratings

LRINEC Score Calculator

Estimate necrotizing fasciitis risk from six initial laboratory values

MEWS Score Calculator

Assess acute illness severity using vital signs and consciousness

NEDOCS Calculator

Assess emergency department crowding using standardized NEDOCS scoring

NIH Stroke Scale Calculator

Calculate NIHSS score and determine stroke severity quickly

qSOFA Score Calculator

Assess bedside sepsis risk using three quick clinical criteria

Revised Trauma Score Calculator

Assess trauma severity using neurological and vital sign measurements

SAPS II Calculator: Simplified Acute Physiology II Score Calculator

Estimate SAPS II severity score and hospital mortality risk

SCORAD Calculator - SCORing Atopic Dermatitis

Estimate atopic dermatitis severity using standardized SCORAD clinical assessment

Sepsis Calculator (Sepsis-3 Criteria)

Assess Sepsis-3 criteria using SOFA and qSOFA clinical data

Shock Index Calculator

Assess circulatory stress using heart rate and systolic pressure

SOFA Score Calculator

Calculate organ dysfunction severity using six SOFA clinical systems

Cholesterol Ratio Calculator

Calculate cholesterol ratios and related atherogenic lipid measurements

Cholesterol Units Converter

Convert cholesterol measurements accurately across commonly used clinical reporting scales

Gout Diagnosis Calculator

Estimate gout likelihood using validated clinical diagnostic criteria and urate.

LDL Calculator

Estimate LDL cholesterol from a standard lipid panel

Metabolic Syndrome Calculator

Assess metabolic syndrome criteria using five cardiometabolic health measurements

SAAG Calculator – Serum-Ascites Albumin Gradient

Estimate portal hypertension likelihood from serum and ascitic albumin

VLDL Calculator

Estimate very low-density lipoprotein cholesterol from triglyceride levels

BMR Tool

Estimate resting calories, daily energy needs and macro targets.

Calorie Tool

Estimate daily calorie needs and plan balanced macronutrient targets.

TDEE Tool

Estimate daily energy needs, calorie targets and macronutrient goals.

20/20 Vision Calculator for 2020

Convert optotype size and viewing distance into visual acuity

90 Minute Sleep Cycle Calculator

Plan bedtime and wake time using sleep cycles and sleep latency.

Aldrete Score Calculator

Assess post-anesthesia recovery using five clinical criteria

BASDAI Score Calculator

Measure ankylosing spondylitis disease activity from six symptom assessments

Beighton Score Calculator

Assess generalized joint hypermobility using nine standardized examination criteria

Berg Balance Test Calculator

Assess balance, mobility, and fall risk across fourteen standardized tasks

Blood Pregnancy Test: What Do HCG Results Mean?

Interpret quantitative HCG results and understand pregnancy test implications

Centor Score Calculator (Modified/McIsaac)

Estimate streptococcal pharyngitis likelihood using five clinical criteria

Circadian Rhythm Calculator

Estimate sleep timing, midpoints, duration, and social jet lag

DASI Calculator (Duke Activity Status Index)

Calculate DASI score and estimated peak oxygen consumption from activity responses.

Dog Walking Benefits Calculator

Estimate calories, distance, steps, and weekly exercise benefits

EASI Score Calculator

Calculate eczema severity using standardized regional clinical assessments

Excessive Weight Gain in Pregnancy

Assess pregnancy weight gain against recommended health guidelines

Fatigue Severity Scale Calculator

Assess fatigue impact using nine standardized severity questions

Free Testosterone Calculator — with Bioavailable Levels

Estimate free and bioavailable testosterone from key blood measurements

Gut Microbiome Score Calculator

Estimate gut microbiome support from diet, lifestyle, and symptoms

Hot Car Calculator

Estimate parked vehicle cabin temperature, heat rise, and safety risk.

How to Maintain or Lose Weight During Pregnancy?

Estimate healthy pregnancy weight goals and recommended progress.

Is BMI (Body Mass Index) a Weight Gain Indicator in Pregnancy?

Assess pregnancy weight gain using BMI and gestational age

Noise Pollution Calculator - Maximal Exposure Time

Estimate safe maximum noise exposure duration from hearing risk levels

Pokémon GO Weight Loss Calculator

Estimate Pokémon GO walking calories and potential weight loss

Positive Pregnancy Test at 3 Weeks Pregnant: Possible or Not?

Assess whether early pregnancy test results are plausible

Pregnancy Weight Gain: Week by Week Breakdown

Estimate recommended pregnancy weight gain, progress, and weekly targets.

REM Sleep Calculator

Estimate REM sleep time, cycles, proportions, and age-based recommendations

Sleep Cycle Calculator

Plan ideal sleep and wake times using complete cycles

Sleep Time Calculator

Calculate ideal bedtime, sleep onset, and total time in bed.

Time Of Death Calculator

Estimate postmortem interval and probable time of death

Twin Pregnancy Weight Gain Calculator

Estimate healthy weight gain ranges throughout a twin pregnancy

Urine Home Pregnancy Test

Estimate urine pregnancy test detection from hCG concentration and sensitivity

Wake Up Calculator

Find ideal wake-up times using sleep cycles and bedtime.

What is a False Negative Pregnancy Test?

Estimate false-negative risk and determine when to retest

What to do after you get a positive pregnancy test?

Plan your next pregnancy steps, timing, and care needs

Adjusted Age Calculator

Calculate corrected age for babies born before term

APGAR Score Calculator

Assess newborn adaptation using five standardized APGAR clinical criteria

Baby Eye Color Calculator

Estimate likely baby eye colors from both parents' eye colors

Baby Formula Calculator

Estimate daily formula needs, feeding amounts, and calorie intake

Baby's Milk Intake Calculator

Estimate daily and per-feed milk needs for babies

Exclusive Pumping Calculator

Estimate milk needs, pumping volume, and supply balance

GIR calculator (Glucose Infusion Rate)

Estimate pediatric glucose delivery from dextrose infusion parameters

Height Calculator

Estimate pediatric growth percentiles and target adult height accurately

Maintenance Fluids Calculator

Estimate pediatric maintenance fluid needs from body weight accurately

Newborn Hyperbilirubinemia Assessment Calculator

Assess newborn bilirubin levels against treatment thresholds and recommendations

PECARN Calculator

Assess pediatric head injury risk using PECARN clinical decision rules

Pediatric Blood Pressure Calculator

Estimate pediatric blood pressure percentiles and clinical classification accurately

Pediatric Blood Transfusion Volume Calculator

Estimate pediatric packed red cell transfusion volume from hemoglobin goals

Pediatric Blood Volume Calculator

Estimate circulating blood volume using pediatric weight and age.

Pediatric GFR Calculator - Glomerular Filtration Rate

Estimate pediatric kidney filtration using height and creatinine

Amoxicillin Pediatric Dosage Calculator

Estimate pediatric amoxicillin doses, liquid volumes, and course quantities

Ibuprofen Dosage Calculator

Estimate weight-based pediatric ibuprofen doses and liquid volumes safely

Infant Tylenol Dosage Calculator

Estimate weight-based acetaminophen doses for infants safely and clearly

Paracetamol Dosage Calculator

Estimate safe pediatric paracetamol doses from weight and concentration

Pediatric Dose Calculator

Estimate pediatric medication doses, volumes, and daily totals accurately.

Pediatric Epinephrine Dose Calculator

Calculate weight-based epinephrine dose and injection volume for children.

Baby Percentile Calculator

Estimate infant growth percentiles using age, sex, and measurements

Birth Weight Percentile Calculator

Estimate newborn growth percentile using birth weight and gestational age.

BMI Percentile Calculator

Estimate child BMI and growth percentile from basic measurements

Fetal Weight Percentile Calculator

Estimate fetal growth percentile from gestational age and ultrasound

Head Circumference Percentile Calculator

Assess child head growth using age, sex, and circumference

Height Percentile Calculator

Estimate height percentile using age, sex, and measured height

IQ Percentile Calculator

Convert IQ scores into percentiles using a statistical distribution.

Weight Percentile Calculator

Estimate child weight percentile using standardized growth charts

Due Date Tool

Estimate pregnancy due dates, gestational age and key milestones.

Period Tool

Forecast menstrual periods, ovulation estimates and fertile window dates.

Pregnancy Tool

Estimate due dates, gestational age, trimesters and milestones.

Pregnancy Weight Gain Tool

Track pregnancy weight changes against BMI-based general gain guidance.

Depression Screening by PHQ-2 Calculator

Screen depressive symptoms quickly using the validated PHQ-2 questionnaire

EPDS Calculator

Screen postpartum depression symptoms using ten EPDS questionnaire responses

GAD-7 Calculator

Measure generalized anxiety symptoms with seven clinically used questions

Happiness Calculator

Estimate overall happiness from wellbeing, emotions, relationships, purpose, and achievement.

Snap Score Calculator

Score SNAP-IV attention, hyperactivity, and oppositional symptoms

Aa Gradient Calculator

Calculate alveolar oxygen pressure and arterial oxygen gradient

BODE Index Calculator

Estimate COPD severity and four-year survival using four clinical measures

CURB-65 Calculator

Assess pneumonia severity using confusion, urea, breathing, pressure, age.

Dead Space Calculator

Estimate physiological dead space fraction and volume from respiratory gases

Endotracheal Tube Size Calculator

Estimate endotracheal tube diameter and insertion depth for airway management

FEV1/FVC Ratio Calculator

Determine the proportion of forced vital capacity exhaled rapidly

Light's Criteria Calculator for Pleural Effusion

Assess pleural effusions using protein and LDH Light’s criteria

Lung Cancer Risk Calculator

Estimate six-year lung cancer risk using validated clinical predictors

Lung Capacity Calculator

Estimate predicted lung volumes and spirometry measures from basic demographics

Lung Nodule Growth Rate Calculator

Estimate pulmonary nodule volume doubling time and growth

Mean Airway Pressure Calculator

Estimate average airway pressure during mechanical ventilation cycles

Oxygenation Index Calculator

Calculate oxygenation severity from oxygen, airway pressure, and arterial oxygen.

Peak Flow Calculator — Estimated Peak Expiratory Flow

Estimate expected peak expiratory flow from age, sex, and height.

PF Ratio Calculator

Calculate arterial oxygenation using oxygen pressure and inspired oxygen concentration.

PSI Calculator

Estimate pneumonia severity, mortality risk, and treatment setting recommendations

Qp/Qs Calculator

Estimate pulmonary-to-systemic blood flow ratio from oxygen saturations

RSBI Calculator - Rapid Shallow Breathing Index

Estimate ventilator weaning readiness using respiratory rate and tidal volume

Tidal Volume Calculator

Estimate protective tidal volume using predicted body weight

Vital Capacity Calculator

Combine lung volume components to estimate total vital capacity

BED Calculator

Estimate biologically effective radiation dose from fractionated treatment parameters.

Medical Radiation Calculator

Estimate absorbed, equivalent, and effective doses from medical radiation

Radiation Dose Calculator

Convert absorbed radiation dose into equivalent and effective dose estimates

TI-RADS Calculator

Calculate thyroid nodule risk category and management recommendations

AHI Calculator | Apnea-Hypopnea Index

Measure sleep apnea severity from overnight breathing event data

Epworth Sleepiness Scale Calculator

Estimate daytime sleepiness from eight everyday situations and responses.

Pediatric Epworth Sleepiness Scale Calculator

Assess daytime sleepiness in children using eight standard situations

Sleep Calculator

Plan ideal bedtimes using sleep cycles and wake times

Sleep Debt Calculator

Measure lost sleep and understand your accumulated sleep deficit

STOP-BANG Calculator

Assess obstructive sleep apnea risk using eight clinical indicators

Adrenal Washout Calculator

Calculate absolute and relative adrenal lesion contrast washout percentages accurately

Albumin Creatinine Ratio Calculator

Estimate urinary albumin loss relative to creatinine concentration

Bladder Volume Calculator

Estimate bladder volume from three measured dimensions accurately

BUN Creatinine Ratio Calculator

Compare blood urea nitrogen and creatinine for kidney assessment

Creatinine Clearance Calculator

Estimate kidney filtration using the Cockcroft-Gault equation

EORTC Bladder Cancer Recurrence and Progression Calculator

Estimate bladder cancer recurrence and progression risks using EORTC factors

FENa Calculator (Fractional Excretion of Sodium)

Estimate fractional sodium excretion from paired urine and plasma measurements

FEUrea Calculator — Acute Kidney Injury Cause Differentiation

Estimate fractional excretion of urea to help differentiate AKI causes

GFR Calculator - Estimated Glomerular Filtration Rate

Estimate kidney filtration using age, sex, and serum creatinine

Kidney Failure Risk Calculator

Estimate two-year and five-year kidney failure risk

Kidney STONE Calculator for Percutaneous Neprolithotomy

Assess PCNL stone complexity using standardized STONE nephrometry scoring.

Kt/V Calculator Daugirdas

Estimate dialysis adequacy using the second-generation Daugirdas equation

Metastatic Prostate Cancer Prognosis Calculator

Estimate survival outcomes using clinical features in metastatic prostate cancer

Prostate Volume Calculator

Estimate prostate volume from three measured dimensions

Protein Creatinine Ratio Calculator

Estimate urine protein loss relative to creatinine concentration

PSA Density Calculator

Estimate prostate cancer risk using PSA and volume measurements

PSA Doubling Time Calculator

Estimate prostate-specific antigen doubling time from serial PSA measurements

TTKG Calculator - Transtubular Potassium Gradient

Estimate renal potassium secretion using the transtubular gradient

Urine Output Calculator

Calculate urine output rate, weight-adjusted output, and daily equivalent values.

URR Calculator - Urea Reduction Ratio

Estimate dialysis adequacy using pre- and post-treatment urea levels