Cannabis Dosage by Weight Chart: How Much THC to Take

A cannabis dosage by weight chart gives you a starting THC range based on how much you weigh. Most charts begin around 1 to 2.5 mg of THC for a first-time user under 130 pounds and scale up to 10 mg or more for heavier or more experienced consumers. The chart is a starting point, not a prescription. Tolerance, metabolism, product type, and how you consume THC all shift the number that works for you.

Medical Cannabis Dosage Chart Printable

THC Dosage by Weight Chart

Use the band closest to your body weight, then pick the column that matches your experience level. If you are between two ranges, start at the lower one.

THC Dosage Chart for Medical Patients

• Under 100 lb: 1 to 2.5 mg for new users, 2.5 to 5 mg for regular users
• 100 to 130 lb: 1 to 2.5 mg new, 2.5 to 5 mg regular
• 130 to 160 lb: 2.5 to 5 mg new, 5 to 10 mg regular
• 160 to 190 lb: 2.5 to 5 mg new, 5 to 10 mg regular
• 190 to 220 lb: 5 mg new, 10 mg regular
• Over 220 lb: 5 to 10 mg new, 10 to 15 mg regular, added slowly

In states that regulate edibles, 10 mg of THC is treated as one standard serving. That means the higher end of this chart equals roughly one to one and a half servings of a typical edible, which is a meaningful amount for anyone without a tolerance.

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Why Body Weight Is Only One Variable

Weight affects how much THC circulates in your body, but it is not the strongest factor. Two people at 170 pounds can have very different experiences with the same 5 mg dose.

how many mg of thc should i take

• Tolerance. Frequent use dulls receptor response, so regular consumers often need more THC for the same result.
• Metabolism. Liver enzymes convert THC into the more potent 11-hydroxy-THC, and enzyme activity varies from person to person.
• Body composition. THC is fat-soluble, so lean muscle mass and body fat both influence how long it stays active.
• CBD content. A product with a meaningful amount of CBD can soften the edge of THC for some users.
• Empty stomach and hydration. Both change how fast an edible is absorbed.
• Medications and health conditions. These can change how your body handles THC.

Milligrams vs. Percentage: Reading a THC Label

Dosage charts are written in milligrams, but flower is sold by percentage. The conversion is simple. A gram of cannabis is 1,000 mg of plant material, so flower testing at 20% THC contains about 200 mg of THC in the whole gram. If you roll a 0.3 g joint from that flower, you are working with roughly 60 mg of THC in the material, though inhaled absorption is well below 100%. Vape cartridges and concentrates usually list total milligrams or milligrams per milliliter, which makes them easier to line up against a chart. Edibles and tinctures already list milligrams per piece or per dropper, so no math is needed.

Edibles and Inhaled THC Do Not Dose the Same Way

The same milligram amount hits differently depending on the route.

• Inhaled (flower, vape, concentrate): effects arrive within minutes, peak in about 10 to 30 minutes, and fade over 2 to 4 hours.
• Edibles and drinks: effects can take 30 to 120 minutes to appear, peak later, and last 4 to 8 hours or longer.

Because edibles arrive slowly, the most common mistake is taking a second dose too soon. If you are using a cannabis dosage by weight chart for edibles, wait at least two hours before deciding the dose was too low.

How to Adjust Your Dose

1. Start at the low end of your weight band, no matter what a friend or a review recommends.
2. Choose one product and one route so you can compare results.
3. Record the milligrams, the time, and how you felt two hours later.
4. Increase by 1 to 2.5 mg at a time, and only after a full day at the current level.
5. Keep the amount steady once you find a comfortable range, and revisit it after any long break.

When to Go Lower Than the Chart Suggests

• This is your first time using THC
• You have not used cannabis in several weeks or months
• You are new to edibles and have only inhaled before
• You are using a high-potency concentrate or a fast-acting drink
• You take prescription medication or have a heart, liver, or mental health condition

A cannabis dosage by weight chart is a useful reference for choosing a first number, and a poor substitute for paying attention to your own response. Start low, move slowly, and let your experience with the product guide the next step.