Pulmonary Calculators

FEV1/FVC Ratio Calculator

Determine the proportion of forced vital capacity exhaled rapidly

Peak Flow Calculator — Estimated Peak Expiratory Flow

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

Qp/Qs Calculator

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

Aa Gradient Calculator

Calculate alveolar oxygen pressure and arterial oxygen gradient

Light's Criteria Calculator for Pleural Effusion

Assess pleural effusions using protein and LDH Light’s criteria

PF Ratio Calculator

Calculate arterial oxygenation using oxygen pressure and inspired oxygen concentration.

CURB-65 Calculator

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

Vital Capacity Calculator

Combine lung volume components to estimate total vital capacity

Tidal Volume Calculator

Estimate protective tidal volume using predicted body weight

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

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

BODE Index Calculator

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

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.

RSBI Calculator - Rapid Shallow Breathing Index

Estimate ventilator weaning readiness using respiratory rate and tidal volume

PSI Calculator

Estimate pneumonia severity, mortality risk, and treatment setting recommendations