Table 2 

Morphine equivalent conversion factors 

Opioid drug 
Oral morphine equivalent dose 


Buprenorphine 
Multiplied by 60 


Butorphanol 
Multiplied by 7 


Codeine 
Divided by 12 


Dihydrocodeine 
Divided by 10 


Fentanyl (patch) 
Multiplied by 150 


Hydrocodone 
Multiplied by 1.5 


Hydromorphone (oral) 
Multiplied by 5 


Hydromorphone (parenteral) 
Multiplied by 10 


Levorphanol 
Multiplied by 6 


Meperidine 
Divided by 12 


Methadone 
Multiplied by 10 


Morphine (parenteral) 
Multiplied by 2 


Oxycodone 
Multiplied by 1.5 


Oxymorphone 
Multiplied by 10 


Pentazocine 
Divided by 4 


Propoxyphene 
Divided by 24 


Tramadol 
Divided by 5 


Cepeda et al. BMC Palliative Care 2010 9:14 doi:10.1186/1472684X914 