Well... im supposing that you want to eat the weed instead smoking it. If it were so, use an amount between 3 and 6 times greater than the amount you would smoke. It must be enough to ensure the same level of highness you would get from smoking, but extended for a WAY longer period, anything between 3 and 12 hours. (Or even more)
I would recommend to look at our recipes section, as there is a LOT of useful information there concerning eating weed, as its NOT so simple as just eating it. If it were not activated, extracted, prepared and consumed the right way, it can be a total waste of weed.
Firecrackers, green dragon, brigadeiros and brownies are the most usual ways to do it. So good luck and enjoy! :thumbsup::eat::stoned: