Answer: A marijuana potency calculator estimates THC per dose by multiplying product weight by labeled THC concentration and then dividing by the number of servings or uses. For flower, THC milligrams per gram equals THC percent times 10. For edibles, divide total package THC by the serving count. The result estimates THC content, not a lab test of what you absorb.

How to Calculate Cannabis Dosage: MG per Serving and Titration

What the Calculator Estimates

A marijuana potency calculator converts a product label into a practical dose estimate. It can show total THC in a batch, THC per edible serving, THC per joint, or THC per concentrate portion. It does not measure CBD, terpenes, or loss from heat.

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Prerequisites

How to Use a Marijuana Potency Calculator

  1. Record the product type and the THC value from the label.
  2. Convert the THC percentage to a decimal by dividing by 100.
  3. Weigh the flower or concentrate you plan to use in grams.
  4. Multiply weight in grams by 1,000 to convert to milligrams.
  5. Multiply that milligram weight by the THC decimal to get total THC milligrams.
  6. Divide total THC milligrams by the number of servings, joints, or doses.
  7. Write the result in a dose log before you use the product.

If the label lists total THC milligrams, use that number and skip the percent conversion.

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Flower and Concentrate Formula

THC mg = product weight in grams × 1,000 × THC decimal. Example: 3.5 g of flower at 20% THC gives 3.5 × 1,000 × 0.20 = 700 mg total THC. A 0.5 g joint contains about 100 mg THC by content.

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Edible and Tincture Formula

THC per serving = total package THC mg ÷ servings per package. Example: a 100 mg package with 10 servings gives 100 ÷ 10 = 10 mg THC per serving.

Example Calculations

Limits of the Estimate

Labels can vary. Combustion destroys some THC. Vaporization and edibles deliver different amounts to the body. The calculator gives THC content, not absorbed dose. Use a low test dose and wait before repeating. Keep edibles out of reach of children and pets.

Dose Log Fields