Two free tools: one checks a lab report against the federal THC limits, the other turns a CBD oil label into mg per serving.
The numbers people look up most, worked out the same way the calculators do.
| Question | Answer | Calculator |
|---|---|---|
| How is total THC worked out? | Delta-9 THC + 0.877 × THCA (federal hemp testing rule, 7 CFR 990.1) | Total THC formula |
| Federal THC limit today | 0.3% delta-9 THC by dry weight | Total THC calculator |
| Federal limit from December 11, 2026 | 0.3% total THC and 0.4 mg total THC per container | Total THC calculator |
| Full-spectrum oil, 30 ml at 0.2% delta-9 | About 55 mg THC per bottle | Total THC calculator |
| 1,000 mg CBD in a 30 ml bottle | 33.3 mg per ml, about 1.7 mg per drop | mg per ml, 1,000 mg bottle |
| 500 mg CBD in a 30 ml bottle | 16.7 mg per ml, about 0.8 mg per drop | CBD dosage calculator |
Use the total THC calculator. It needs the delta-9 THC and THCA lines from the lab report and the package size, and it shows today's 0.3% test and the 0.4 mg per container cap from December 11, 2026. Then check your state on the CBD law map.
Use the CBD dosage calculator. It needs only the label: total CBD, bottle size and your serving. It does the math; it does not recommend a dose.
Open these official sources, with links, on our verification page →
General information, not legal or medical advice. The calculators work only from the numbers you enter.
To check whether a product fits the federal THC limits, use the total THC calculator. To work out how much CBD is in a serving from the label, use the CBD dosage calculator.
No. They check the numbers you enter. State rules add their own limits; check your state on the CBD law map.
No. The calculators do label and lab-report math only. Ask a doctor or pharmacist about dosing.