A cannabis concentrate dosing calculator converts a concentrate's THC percentage and weight into milligrams of THC. The core formula: milligrams of THC = grams of concentrate × THC percentage × 1000.

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The formula

One gram equals 1000 milligrams. A concentrate labeled 70% THC holds 700 mg of THC per gram. A 0.5 g sample at 70% holds 350 mg.

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Formula: mg THC = weight in grams × (THC % ÷ 100) × 1000. Example: 0.05 g at 80% THC = 0.05 × 0.8 × 1000 = 40 mg THC.

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Standard serving size

Several US states set 10 mg THC as one serving. Colorado and Washington use 10 mg. A single 40 mg dab equals four standard servings. That dose suits heavy tolerance, not a new user.

What Is a Good Starting Dose for Edibles? Calculator Guide

Common concentrate potencies

Labels vary by batch. Use the tested number on the package, not the strain name.

How to use a calculator

  1. Read the THC percentage on the label. Use total THC, not THCA alone.
  2. Weigh the concentrate on a milligram scale. A typical dab is 0.025 g to 0.05 g.
  3. Enter weight and THC % into the formula.
  4. Divide the result by 10 to count standard 10 mg servings.

Example doses

0.025 g at 70% = 17.5 mg THC. 0.05 g at 70% = 35 mg THC. 0.1 g at 90% = 90 mg THC. A 1 g jar of 80% concentrate holds 800 mg THC total.

Limits of the math

The formula gives the amount of THC in the sample. It does not predict how your body absorbs it. Inhalation loss, device temperature, and tolerance change the effect. Edible dosing differs because the liver converts THC to 11-hydroxy-THC. A calculator cannot set a safe dose for a person. Start low, record the number, and wait before redosing.