How long until your tolerance resets?
There's no single answer. It depends on how much your brain has adapted. Tell it three honest things and it gives you a realistic window for your CB1 receptors to recover, plus what to expect. It's a guide, not a lab test, but it beats guessing.
Nothing you pick is saved or sent. The estimate updates as you change your answers.
This is an estimate of when your tolerance resets. A different question from whether you should quit. If reaching the end of the break feels like relief rather than a countdown, that's worth noticing. MIXEDEvidence strength Regular cannabis use down-regulates the brain's CB1 receptors (the ones THC acts on), which is the main driver of tolerance. Abstinence reverses this, but the speed depends on how much you'd adapted. Key study: Hirvonen et al. (2012), in Molecular Psychiatry, brain-scanned chronic daily cannabis smokers and found reduced CB1 receptor density that returned towards normal after about four weeks of abstinence, with recovery beginning within days. Why it's "mixed": the direction is well established, but the exact timeline varies a lot between people: genetics, body composition, and just how heavy the use was. Treat any single number as the middle of a range, not a deadline. Lighter or shorter-term users reset faster; the heaviest users can take the full four weeks or a little more.
Got your number? Here's how to actually do it.
Knowing the length is the easy part. Getting through the first few days and coming back low is where a break is won or lost.