Cannabis butter: leaves to butter ratio?

Hello,

Is there a way to calculate how much butter is needed for a certain amount of leaves/stems to make cannabis butter?

Also, an estimation of the number of minutes/hours needed to prepare the butter (in regards to the number of grams of leaves/stems)?

You don't really want to waste your time with the stems or sun leaves in my opinion. Very little good stuff in them. Just the sugar leaves and larf.

I use an ounce for 2 sticks of butter. Any less butter and there's not enough fat content to hold the THC.