Use this free tolerance break calculator to estimate how long a cannabis T-break should be for you, based on how often you use, what you use, and how long you’ve been at it. It’s a starting-point estimate grounded in receptor-recovery research — not medical advice.
How the tolerance break calculator works
The estimate is based on the biggest drivers of cannabis tolerance: how often you use, how potent your usual product is, and how long you’ve been using regularly. Frequency and potency push your CB1 receptors to down-regulate faster, so heavier, higher-THC use calls for a longer reset. The upper bound reflects research showing CB1 receptor density returns toward normal after roughly four weeks of abstinence in chronic users (Hirvonen et al., 2012, Molecular Psychiatry). For the full breakdown, see our guide on how long a tolerance break should be and the day-by-day tolerance break chart.
Don’t want to take a long break?
If the number above is longer than you’d like, you have options — from lowering your tolerance without quitting to the olivetol-based, 5-night approach behind Undoo Reset. See how the olivetol reset works to weigh it against a traditional break.
This calculator is for general educational purposes only and is not medical advice. Undoo Reset is a dietary supplement and is not intended to diagnose, treat, cure, or prevent any disease. 21+ only; follow your local laws.
Frequently asked questions
How accurate is a tolerance break calculator?
It’s a guide, not a precise measurement. Tolerance depends on individual factors like genetics, metabolism, and exact dose that no calculator can capture. Use the result as a sensible starting range, then adjust based on how your first session back actually feels.
What’s the ideal length for a THC tolerance break?
For most regular users, 2 to 4 weeks gives the clearest reset, while light users often feel a difference in just a few days. The research points to about four weeks of abstinence for CB1 receptors to fully normalize in chronic users.