(the no-guesswork answer that works every single time)
Stop throwing random handfuls in the jar. Here’s the exact math that 99 % of people get wrong, broken down so you never waste weed or make 400 mg “oops” brownies again.
The real numbers (after decarb + infusion losses)
Average survival rate from flower to finished edible: 80–85 %
That means for every 100 mg of THC on the lab label, you actually get 80–85 mg in your food.
Quick cheat sheet (memorize these three lines)
For 20 % flower → 1 gram gives you 160–170 mg final THC
For 22 % flower → 1 gram gives you 175–185 mg final THC
For 25 % flower → 1 gram gives you 200–215 mg final THC
For 28–30 % fire → 1 gram gives you 225–255 mg final THC
Real batch examples (most common requests)
Want 10 mg edibles, 30 pieces = 300 mg total batch
20 % flower → 1.8–1.9 g
22 % flower → 1.6–1.7 g
25 % flower → 1.4–1.5 g
30 % flower → 1.2–1.3 g
Want 20 mg edibles, 20 pieces = 400 mg total
20 % flower → 2.4–2.5 g
22 % flower → 2.2–2.3 g
25 % flower → 1.9–2.0 g
30 % flower → 1.6–1.7 g
Want 500 mg total in 1 cup of oil/butter (strong base fat)
20 % flower → 3.0–3.1 g
25 % flower → 2.4–2.5 g
30 % flower → 2.0 g exactly
Pro tweaks that squeeze extra potency
Add lecithin → +10–15 %
Use clarified butter or refined coconut oil → +5–10 %
Sous-vide or sealed-jar method → +5 %
So a perfect run with 25 % flower can push 1 g to almost 240 mg usable.
The one-gram rule of thumb
If you’re lazy and your weed is 20–25 %, just use 1 gram of flower per 200 mg you want in the batch.
Need 600 mg? 3 grams. Need 1000 mg? 5 grams. Close enough 95 % of the time.
Never again ask “how much weed for brownies?”
Weigh your flower once, pick your target total mg, divide by 200, done.
Your doses will be perfect every batch, every strain, forever.