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Opioid Equianalgesic Dose Conversion Calculator

Convert oral morphine equivalents (OME) between opioids.

Converts the dose of one opioid to the equianalgesic dose of morphine (OME/MME) or another opioid for safe analgesic switching.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

OME = dose × conversion_factor; new_dose = OME / new_factor × 0.5–0.75

In depth

Converts the dose of one opioid to the equianalgesic dose of morphine (OME/MME) or another opioid for safe analgesic switching.