What neither of those answers really addresses is what the cannabinoid content was in the initial trim. Not all trim is created equal. Your starting biomass has a potency. The higher that potency, the more cannabinoids you can extract from it, and the greater your overall yield.
As a general rule, most extraction methods target 90% extraction of cannabinoids. you can do better than this, but most folks eventually realize that running solvent over the biomass three times just isn’t worth the effort.
so: assuming starting trim is at 10% cannabinoids, and target is ~90% cannabinoids. what you really want to know is how efficient is the overall process. from biomass to finished distillate.
if it was 100% efficient, ie no losses then 1kg of 90% would require 9kg of 10% right?
The number I’ve been using is 75% overall efficiency. It is based on numbers others have been throwing around, rather than data I have generated myself (no In House analytics in the lab I’ve done my distillation in).
that means instead of 9kg at 10% potency, you’ll need closer to 12kg.
now adjust those numbers to the potency of the input you have available.
lets look at @IKnowNothing’s numbers with this in mind
50lbs at 8% yield of 60% THC.
Assuming 90% extraction efficiency on the crude.
50lb x 454g/lb x 0.08 => 1816g “crude” at 60% cannabinoids.
1816g x 0.60 => 1089g of THC available in the crude.
(so biomass has 1089g x 1.111 ~ 1210g THC in 50lb which is about 5.3%, and is a reasonable approximation of what you’ll playing with)
from that 1089g of THC in that 1816g of crude @IKnowNothing suggests ~1000g of 90% distillate.
so 900g THC out of the 1210g that were in his biomass when he started.
which is a 74% overall efficiency (thanks @IKnowNothing !!)
throw 10kg of flower at 25% THC at the problem, you get
10kg x 0.25 x 0.75 = 1.875kg of THC
or 2kg of distillate at 90% THC.
Edit: ok, I actually did have access to in house analytics, but the Sage Analyzer just isn’t up for the task of making heads or tails of heads/tails/main body.