Opioid Conversion (MME) Calculator

Work out opioid conversion (mme) instantly with clear inputs, formula shown and shareable results.

About Opioid Conversion (MME) Calculator

Multiplies a total daily opioid dose by the CDC morphine milligram equivalent factor and compares the result with the 50 and 90 MME/day thresholds.

Formula

MME conversion

MME/day = total daily dose x conversion factor (morphine 1, oxycodone 1.5, hydromorphone 4, codeine 0.15, tramadol 0.1)

Worked example

With the default values below, Opioid Conversion (MME) Calculator returns Morphine milligram equivalents of 90.0. Change any input above and every figure here is recalculated in your browser.

Inputs used

Opioidone of Morphine (oral), Oxycodone, Hydrocodone, Hydromorphone, Codeine, Tramadol: Oxycodone
Total daily doseaccepts 1–2,000 mg/day: 60 mg/day

Results

Morphine milligram equivalents: 90.0 MME/day
CDC conversion factor: 1.50
CDC threshold band: At or above 90 MME/day — CDC advises avoiding or carefully justifying

Step by step

1Values used
2MME conversion
3Morphine milligram equivalents= 90.0 MME/day
4CDC conversion factor= 1.50
5CDC threshold band= At or above 90 MME/day — CDC advises avoiding or carefully justifying

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Why is methadone excluded?

Methadone conversion is dose-dependent and non-linear, so it should never be converted with a single fixed factor.

Is MME a switching dose?

No. When rotating opioids the calculated equivalent is reduced by 25 to 50% for incomplete cross-tolerance.