Table 2

MME conversion factors

OpioidConversion factor
Oral opioids
Codeine (mg)0.15
Tramadol (mg)0.1
Hydrocodone (mg)1
Oxycodone (mg)1.5
Methadone (mg/day)
1–204
21–408
41–6010
≥61–8012
Morphine (mg)1
Hydromorphone (mg)4
Transdermal opioids
Fentanyl (μg/hour)2.4
Intravenous opioids
Morphine (mg)3
Hydromorphone (mg)15
Fentanyl (μg)0.2
  • Morphine milligram equivalents (MME) will be calculated by converting consumed opioids to MME using the above conversion factors.