The Marijuana THC Drug Test Calculator

Marijuana THC Drug Test Calculator

The passing probabilities and trendlines that this calculator provides are derived from the measurements and urine test results of several thousand people who have submitted their data to us. Please come back and do the same. With this data, we're able to determine your odds of passing a marijuana drug test.


Calculates Passing Probabilities For:

  • Lab Tests with unaltered urine
  • Lab Tests using dilution or detox methods
  • Home Test Kits with unaltered urine
  • Home Test Kits using dilution or detox methods


Directions: Completely fill in the form below. When measuring the circumference of your waist, it is essential that you take the measurement at your belly button. The size of your pants is not a waist measurement and may skew the accuracy of your calculation. It's best to use a tape measure. However, a regular ruler, a piece of string, and some basic math skills will be adequate. If you lack a piece of string, be creative!











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