rule of thumb is use 1 oz of green to 1 lb butter
make the oil using hash (recipes are all over this place on canna oil)
quantities will vary by user..
I make my oil with about 2oz per 1 1/2 cup oil being I need mine stronger then most of you..... (this is a curse not a blessing trust me!)
what it comes down to usually for most folks here is
.25- .50g per medible
so
10 grams of green = aprox 20 cookies or 40 if you need them half as potent
for HASH I would say 1gram of hash = aprox 10 grams green (based on a 10% return from a 10gram hash run generally =10% return =1g ) YES it will very but this is the avg.
if you are new to edibles start with just .10g-.25 g on each medible is using hash