Instructions: Fill in the mg per day* for whichever opioids your patient is taking. The web page will automatically calculate the total morphine equivalents per day.
*NOTE: All doses expressed in mg per day with exception of fentanyl transdermal, which is expressed in mcg per hour
CAUTION: This calculator should NOT be used to determine doses when converting a patient from one opioid to another. This is especially important for fentanyl and methadone conversions. Equianalgesic dose ratios are only approximations and do not account for genetic factors, incomplete cross-tolerance, and pharmacokinetics.
† There are special considerations for calculating Methadone (Methadose, Dolophine) MED, please view the following page for conversion factors and references: Methadone Conversion Factors
This opioid dose calculator was developed by the Washington State Agency Medical Directors’ Group to be used in conjunction with the Interagency Guideline on Prescribing Opioids for Pain. For more info, please refer to the guideline at: AMDG – 2015 Guideline
For technical questions or comments, please contact: AMDG Web Support. Please note: this calculator is not compatible with IE 7 or below.