What does OpioidCalc calculate?

It calculates oral morphine equivalents and compares supported opioids, routes and formulations.

Can I use my own conversion factors?

Yes. You can adjust factors to match an approved local reference.

Does it replace local guidance?

No. Results are estimates for qualified healthcare professionals. Check the medicine, route, patient factors and local policy before using a result.

Does it work offline?

Yes. Calculations work without an internet connection after the app is installed.

What data leaves my device?

Medicine selections, doses and results stay on your device. The app collects limited analytics, purchase and crash data described in the Privacy Policy. Do not enter patient identifiers.

Opioid conversion calculator for clinicians

Name: Opioid Conversion Calculator
Author: E2 Apps

Calculate oral morphine equivalents, compare opioid regimens and check clinical context in one iOS and Android app.

Download Now

Free download. Optional Pro features available in the app.

Open on your phone

50,000+ downloads across iOS and Android

Multiple opioids
Works offline
6 languages

OpioidCalc calculator with a multi-opioid regimen entered and the Convert button ready

What OpioidCalc can do

Add current opioids, review the combined OME, compare a target dose and open the supporting details beside the result.

OpioidCalc conversion result with the source regimen and an oxycodone target — Compared regimens

OpioidCalc equivalent dose options for a multi-opioid regimen — Equivalent dose options

Convert a complete regimen

Add multiple opioids, routes and formulations. See each dose's OME contribution before comparing a target regimen.

Methadone and breakthrough dosing

Work through methadone-specific conversions, choose a target OME and calculate a breakthrough dose with clear prompts.

OpioidCalc methadone conversion result — Methadone result

OpioidCalc breakthrough dose calculation — Breakthrough dose

Open clinical notes and product details

Open practice points, formulation-specific pharmacology and regional product information without leaving the calculation.

OpioidCalc pharmacology information for oral oxycodone — Clinical pharmacology

OpioidCalc regional oxycodone products and strengths — Regional products

Use local factors and personalise the app

With Pro, set local conversion factors and choose which opioids appear. The app works offline in six languages.

OpioidCalc custom conversion factor setting — Local conversion factor

OpioidCalc screen for choosing visible opioids — Visible opioids

Clear about the limits

Equianalgesic ratios differ between references and may change with dose, route and patient factors. Use OpioidCalc as a calculation aid, then check the result against current local guidance.

OpioidCalc is created and maintained by E2 Apps in Australia, with a direct route for corrections and clear information about evidence, privacy and clinical use.

How to interpret results Who is behind OpioidCalc Privacy

Explore the medicine references

Check routes, formulation details and limitations before using a conversion factor.

Morphine Oxycodone Hydromorphone Fentanyl Methadone All medicines

Opioid conversion FAQ

How to interpret results Contact support

Get OpioidCalc

Calculate OME and compare opioid regimens on iOS and Android.

Free download with optional in-app purchases. For qualified healthcare professionals. Check results against local guidance.