A peth test calculator is an online tool that can estimate the length of time that has passed since a person last consumed alcohol.
Peth, or phosphatidylethanol, is a substance that is produced in the body when alcohol is consumed. The amount of peth in a person’s system can be measured through a blood or urine test. Peth levels can be detected for up to several weeks after alcohol consumption. As a result, peth testing can serve as a more accurate measure of alcohol use than traditional blood alcohol testing, which can only detect alcohol that has been recently consumed.