A starting dose of cannabis concentrate is 1 to 2.5 mg of THC for a new or low-tolerance user. Concentrates run 60 to 90 percent THC, so one rice-grain dab can hold 15 to 40 mg of THC. That is 2 to 4 times a standard 10 mg edible serving. Weigh your concentrate, multiply by its THC percentage, and divide the result into measured portions before you inhale or ingest anything.

Cannabis Concentrate Dosage: How Much THC Is in a Dab?

How to Calculate THC mg in a Concentrate

Labels list total THC as a percentage. Convert that percentage into milligrams with four steps.

Can You Overdose on Cannabis Concentrate?

  1. Weigh the concentrate on a gram scale and write the weight in grams.
  2. Convert grams to milligrams by multiplying by 1,000. A 0.05 g dab equals 50 mg of material.
  3. Multiply the material weight by the THC percentage written as a decimal. A 50 mg dab at 80 percent THC equals 40 mg of THC.
  4. Divide the total by the number of doses you plan to take from that portion.

Example: 1 g of shatter labeled 85 percent THC holds 850 mg of THC. Split it into 0.02 g pieces and each piece carries about 17 mg of THC.

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Cannabis Concentrate Dosage Chart by THC mg

Concentrate Type and Typical THC Range

Inhaled vs Oral Concentrate Timing

Inhaled concentrate takes effect in 1 to 5 minutes, peaks at 10 to 30 minutes, and fades over 1 to 3 hours. Oral concentrate takes 30 to 120 minutes to appear and can last 4 to 8 hours. Do not redose an edible or tincture before the 2-hour mark. Most difficult experiences come from taking a second oral dose before the first one has peaked.

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How to Raise Your Dose Safely

  1. Start at 1 to 2.5 mg of THC.
  2. Wait 15 minutes for inhaled concentrate or 2 hours for oral.
  3. Record the effects in writing, including onset time and peak intensity.
  4. Add 1 to 2 mg only at your next session, never inside the same one.
  5. Hold at each new level for at least two sessions before raising it again.
  6. Cap your daily total at a level you have already tested.

When to Stop or Lower the Dose

CBD can soften the edge of a high-THC dose. Water, rest, and a calm room help more than another dab. Keep concentrates away from alcohol, and never drive after use.