How long would it take to rid of the thc in your body if you don't smoke a lot?

Depends on use.: Marijuana is not what is detected but the active compound thc is. It depends on how often you use it. If you used it only once it can be detected by blood for 12-24 hours while it is detected in urine from 1-7 days. With regular use it can be detected in blood for 2-7 days and in urine anywhere from 1-100 days even if a heavy user. Age, height, weight, metabolism all are considered factors.