For non-frequent (infrequent) users, marijuana (THC) typically stays detectable in urine for about 1 to 3 days after use. This detection window applies to those who smoke less than twice per week

. Some sources note that a single use may be detectable up to 3 days, but generally not longer for infrequent users

. Factors influencing this detection time include metabolism, body fat, hydration, and the amount consumed. Urine tests detect THC metabolites, which are fat-soluble and cleared more slowly in the body, but for non-frequent users, the metabolites usually clear within a few days

. In summary:

• Non-frequent users: THC detectable in urine for about 1–3 days after last use

• Detection beyond this period is more common in frequent or chronic users.

This timeframe is consistent across multiple reputable sources and reflects typical drug testing windows for occasional marijuana use.