This has been bugging me for ages, and I've been searching the 'net like a madwoman. Hopefully someone can put this to rest. So usually people buy their marijuana in these units: eighths, grams, quarters, half-quarters, etc, from people. How many eighths in a gram? How many grams in a quarter? Half quarter? How much marijuana in a dime-sack? Fifty? I'm just confused as to all this mathematical stuff. Thanks in advance to those who can help me out.