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Calculate the exact THC and CBD dosage in your cannabis edibles. Select your material, infusion method, and recipe details to get precise milligram-per-serving calculations with a visual dose gauge.

Calculate THC per serving for any cannabis edible. Enter your material type, weight, THC%, infusion method, and number of servings for accurate dosing with a full math breakdown.

Quick Reference — 7g flower (20% THC), oven decarb, butter stovetop

8 servings

123mg

12 servings

82mg

24 servings

41mg

48 servings

21mg

mg THC per serving. Varies by strain, decarb method, and infusion efficiency.

Cannabis Edible Dosage Reference Table

THC per serving (mg) for 7g of flower infused into butter, 88% decarb, 80% infusion efficiency. Adjust based on your specific setup.

Material	Weight	8 servings	12 servings	24 servings	48 servings
Flower (20%)	3.5g	62mg	41mg	21mg	10mg
Flower (20%)	7g	123mg	82mg	41mg	21mg
Flower (20%)	14g	246mg	164mg	82mg	41mg
Trim (12%)	14g	148mg	99mg	49mg	25mg
Kief (40%)	3.5g	123mg	82mg	41mg	21mg
Concentrate (75%)	1g	66mg	44mg	22mg	11mg
Distillate (90%)	1g	60mg	40mg	20mg	10mg

How Cannabis Edibles Work

When you eat a cannabis edible, THC is absorbed through your digestive system and processed by your liver, which converts it into 11-hydroxy-THC — a metabolite that crosses the blood-brain barrier more effectively than THC from smoking. This is why edibles feel stronger and last longer (4-12 hours vs. 1-3 hours for smoking). The onset takes 30-120 minutes because the THC must pass through your stomach and liver before reaching your bloodstream. Factors like whether you have eaten recently, your metabolism, and your body composition all affect how quickly you feel the effects.

Understanding Decarboxylation

Raw cannabis contains THCa (tetrahydrocannabinolic acid), which is non-psychoactive. Decarboxylation is the chemical process of removing a carboxyl group from THCa to create psychoactive THC. This happens naturally when you smoke or vaporize cannabis, but for edibles you must decarb before infusing. The most reliable home method is oven decarboxylation at 240°F (115°C) for 40 minutes. Under-decarbing leaves potential THC unconverted, while over-decarbing (too hot or too long) degrades THC into CBN, which is sedating but not psychoactive in the same way. Mason jar and sous vide methods offer better temperature control and preserve more terpenes.

Safety Guidelines

Start low and go slow — this is the golden rule of edibles. Begin with 2.5-5mg THC for your first time, even if you are an experienced smoker. Wait at least 2 hours before considering a second dose. Edible effects are dose-dependent and can be intense at higher amounts. Keep edibles clearly labeled and stored away from children and pets. Do not drive or operate machinery. If you feel overwhelmed, remember: no one has ever fatally overdosed on cannabis. Find a calm environment, stay hydrated, and consider CBD which may help modulate the effects. The experience will pass within 4-12 hours.

Frequently Asked Questions

How do I calculate edible dosage?

Multiply the weight of your cannabis (in grams) by its THC percentage to get total milligrams. Apply decarboxylation efficiency (~88% for oven method) and infusion efficiency (~80% for stovetop butter). Divide the result by the number of servings. For example: 7g flower at 20% THC = 1,400mg raw THC × 0.88 decarb × 0.80 infusion = 985.6mg ÷ 12 servings = 82.1mg per serving.

What is decarboxylation and why does it matter?

Raw cannabis contains THCa (tetrahydrocannabinolic acid), which is not psychoactive. Decarboxylation is the process of applying heat to convert THCa into THC. Without decarbing, your edibles will have minimal effect. The most common method is baking at 240°F (115°C) for 40 minutes.

How much cannabutter should I use per serving?

It depends on the potency of your cannabutter. Use our calculator to determine the exact THC content per tablespoon of your infusion. A common starting dose for beginners is 5mg THC per serving. If your butter contains 40mg THC per tablespoon, you would use about 1/8 tablespoon per serving.

What's the difference between THC% and THCA%?

Lab labels typically show THCA% (the acid form found in raw cannabis). To convert THCA to THC, multiply by 0.877 — this accounts for the loss of the carboxyl group during decarboxylation. For example, 22% THCA = 19.3% THC. Our calculator handles this conversion automatically when you select 'THCA% (lab label)' mode.

How long do edible effects last?

Edible effects typically begin 30-120 minutes after consumption, peak at 2-4 hours, and can last 4-12 hours total. Your liver converts THC to 11-hydroxy-THC, which crosses the blood-brain barrier more effectively and produces stronger, longer-lasting effects than smoking. Never re-dose within 2 hours of your first serving.

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This calculator provides rough estimates based on averages and should not be used as a substitute for professional advice. Actual cannabis potency varies significantly by strain, growing conditions, and lab testing methods.

The efficiency values used (decarboxylation and infusion) are typical averages. Your actual results may vary depending on temperature control, time, technique, and equipment quality.

Cannabis edibles affect everyone differently. Body weight, metabolism, tolerance, recent food intake, and individual biochemistry all play a role. Always start with a low dose and wait at least 2 hours before consuming more.