THC % to milligrams calculator
This calculator compares cannabis percentage to milligrams. It is label math only, not dosing advice.
mg THC = (THC % ÷ 100) × grams × 1000
THCa conversion calculator
Use this for labels that list THCa and delta-9 THC separately.
Estimated total THC ≈ Δ9 THC + (THCa × 0.877)
Example conversions
| Product math | Result |
|---|---|
| 1 g at 20% | About 200 mg total THC before losses. |
| 0.5 g at 28% | About 140 mg total THC before losses. |
| 0.25 g at 30% | About 75 mg total THC before losses. |
| 10 mg edible | Already listed as amount, not percentage. |