IT ALL DEPENDS ON HOW UR GONNA INGEST IToops i mean if ur gonna use the butter to cook somthing else like brownies or cookies or sum.
if u wann get really baked i would find sum high fat content chocolate @ trader Joes, then melt it in a crock pot and grind ur herb into fine powder, then drop it in the chocolate and simmer for like 45 min and a little piece about 2" sq will get u baked real good. (about 7g - 70g of chocolate)
other wise do the same with your butter only cook it 3 times as long and strain it out with a cheese cloth. and spread on toast to get toasted.
calculating the thc content is next to near impossible because of all the variables but its either bomb or just good.
bon apitiet
chocolate is a week MOA inhibitor wich means u stay higher longer.
PEACE