Opioid Conversion Calculator
Calculate daily opioid exposure and oral morphine equivalents from selected medication, dose, and frequency. Opioid Conversion Calculator helps clinicians, pharmacists, and healthcare educators compare opioid potency safely.
Highlights
- Convert common oral opioid doses into estimated morphine milligram equivalents (MME).
- Supports codeine, hydrocodone, hydromorphone, methadone, morphine, oxymorphone, oxycodone, and tramadol.
- Calculate total daily opioid dosage based on dose per administration and daily frequency.
- View estimated morphine equivalents per administration and per day.
- Designed to support clinical, pharmacy, and healthcare education comparisons; not a substitute for professional guidance.
Table of Contents
How Opioid Conversion Calculator Works?
The Opioid Conversion Calculator estimates daily opioid exposure and expresses it as an oral morphine equivalent daily dose (MEDD). First, it multiplies the dose taken at each administration by the number of administrations per day. It then applies a medication-specific conversion factor to estimate the equivalent amount of oral morphine.
The morphine equivalent for one administration is calculated separately by multiplying the selected dose by the same conversion factor:
The calculator applies a standardized factor for the selected opioid. The factors used for comparison are:
| Opioid | Conversion Factor |
|---|---|
| Codeine | 0.15 |
| Hydrocodone | 1 |
| Hydromorphone | 5 |
| Methadone | 3 |
| Morphine | 1 |
| Oxymorphone | 5 |
| Oxycodone | 1.5 |
| Tramadol | 0.1 |
For example, a regimen of 10 mg per administration taken 3 times per day produces a total daily dose of 30 mg. If the selected medication has a factor of 1.5, the estimated morphine equivalent daily dose is 45 mg/day, and the estimated morphine equivalent per administration is 15 mg.
Practical Use Cases
Clinicians can use the calculator to estimate the daily morphine equivalent of a patient's current oral opioid regimen when reviewing treatment intensity, documenting medication histories, or assessing cumulative opioid exposure.
Pharmacists can use it as a screening and counseling aid when comparing common oral opioids, checking dose-frequency calculations, and identifying regimens that require closer clinical review.
Pain specialists can use the daily and per-administration estimates to support structured discussions about opioid therapy, while recognizing that a morphine equivalent is not a direct substitute dose for another medication.
Healthcare educators and students can use the calculator to demonstrate how dose frequency and medication-specific potency factors affect total daily exposure and estimated morphine equivalents.
Patients and caregivers may use the calculator for general education about a prescribed regimen, but the result should not be used to change, stop, combine, or replace opioid medicines without the prescribing clinician's direction.
Accuracy and Limitations
The calculator performs the stated arithmetic consistently using the selected opioid's fixed conversion factor, entered dose, and administrations per day, but the result is an estimate rather than a directly interchangeable dose. Conversion factors can differ among clinical references, and opioid response varies with tolerance, age, organ function, drug interactions, formulation, and treatment history; methadone in particular may require more specialized interpretation. The calculator does not account for incomplete cross-tolerance, breakthrough doses beyond the entered schedule, nonoral routes, combination products, or patient-specific safety considerations, so it must not be used alone to select a new opioid dose or make prescribing changes.
Quick Examples
Example #1: Hydrocodone Routine Regimen
Estimate daily opioid exposure for a patient taking scheduled hydrocodone doses.
Example #2: Oxycodone Three-Times-Daily Regimen
Compare the morphine equivalent exposure of a moderate oxycodone dosing schedule.
Example #3: Low-Dose Tramadol Regimen
Estimate total daily opioid exposure for a patient using tramadol at regular intervals.
