MME Calculator (Morphine Milligram Equivalents)
The MME Calculator converts a daily opioid dose into morphine milligram equivalents using standard conversion factors, to help assess overdose risk. For clinical education only.
Rates and fees change frequently. Always confirm the current figures
with the official authority before relying on this result.
Formula
MME/day = Daily Dose × Opioid Conversion Factor
- Doses of 50 MME/day or more raise overdose risk; 90 or more warrants extra caution.
- Conversion factors are approximate and do not apply to methadone or fentanyl patches.
Oxycodone 60 mg/day
Inputs
- Opioid: 1.5
- Total Daily Dose: 60 mg/day
60 × 1.5 = 90 MME/day (high risk category).
Frequently asked questions
Why calculate MME?
It standardises different opioids to a morphine-equivalent dose so overdose risk can be compared and managed.