31 grams in a Troy ounce
28 in an Imperial Ounce
15.5 for Troy Half, 14 for Imperial.

Rest handles itself if you see the pattern.

Cheers!
khyberkitsune Reviewed by khyberkitsune on . How to convert ounce, pound, 1/2, 1/4, 1/8 etc. to gram? We buy our weed in grams here, so when I read on international sites how much people smoke and what they pay for an ounce(oz) or an 1/8 a 1/4, a 1/2 etc. I'm always confused and have no clue what they're talking about and whether the prices are good or not. There are so many different ounces and pounds that I don't even know which ounce or pound to use if I want to convert to grams. (source wikipedia) International avoirdupois ounce 28.3495231 grams International troy ounce 31.1034768 Rating: 5