Free Drug and Alcohol Testing Calculators
Three free tools, all built on cited research and all free to embed with a link back.
Ad: we may earn a commission if you buy through this link. Information only, not medical or legal advice. Tampering with a drug test can be illegal and usually counts as a refusal. The only sure way to pass is to not use.
Calculators
- Detection window calculator: urine, saliva, hair and blood, by substance.
- BAC calculator: blood alcohol estimate and time back to zero.
- THC estimator: weed detection by use pattern and cutoff.
Reference data
Ad: we may earn a commission if you buy through this link. Information only, not medical or legal advice. Tampering with a drug test can be illegal and usually counts as a refusal. The only sure way to pass is to not use.
No product can promise you a pass, and the only certain way is to not use. Tampering with a drug test can be illegal and is usually treated as a refusal. We never help anyone beat DOT, federal, safety-sensitive, or court-ordered tests. If substance use is getting on top of you, call the free, confidential SAMHSA National Helpline on 1-800-662-4357 (24/7, English and Spanish), or call or text 988 in a crisis. Source: samhsa.gov.