10/13/2026
THC hangs around in your body with a half-life of 20 to 40 hours.
That's the actual biological reason heavy, regular users can still test positive for weeks after they stop -- it's not bad luck, it's chemistry.
Occasional users clear it way faster than daily or heavy users. So "just wait it out" isn't one timeline. It's a completely different countdown depending on how much and how often you actually used.
Figure out your own timeline here: https://greenfleets.org/blog/drug-test-calculator/