How to convert ounce, pound, 1/2, 1/4, 1/8 etc. to gram?

[TheAnyKey]

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!

When people talk just about ounces, how can I know about which ounce they talk?

I've never seen anybody saying he bought a "Troy" ounce or an "Imperial" ounce. If they just talk 'bout ounces, how can I know which ounce they talk about, if both are valis possibilities?

theres 28 grams in an oz
14 grams in a half
7 grams in a 1/4
3.5 grams in an 1/8
hope this helps

Thank you. Thats the imperial ounce, I suppose. But is the Imperial ounce always used to measure weed or could it as well be the above mentioned 31g Troy ounce? How can I know about which ounce people talk?