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Knowing the dose per serving is the difference between a great experience and an overwhelming one. Our free edible dosage calculator takes the guesswork out of cannabis cooking. Just plug in your numbers and let the math do the work.
Not sure of your THC%? Select a type below for a reliable starting point. If you know the exact THC%, enter it manually in Step 2.
30% is a reliable estimate for most home infusions.
Your Infusion Results
1 tbsp = 3 tsp
Your Recipe Results
Disclaimer: This calculator provides estimates only. Actual potency depends on decarboxylation efficiency, strain variation, infusion method, and other factors. Cannabis affects everyone differently. Start low and go slow — especially if you are new to edibles.
This calculator mirrors the actual process of making infused edibles at home. Three steps, precise results.
Weight in grams, THC% and CBD% from your product's lab report or packaging. If unsure, 18–22% is a safe assumption for mid-shelf flower.
Enter the volume of your infusion base (butter, coconut oil, olive oil, alcohol, etc.). The calculator shows total mg of THC and CBD in your batch, plus potency per teaspoon and tablespoon.
Enter how much infused oil your recipe uses and the number of servings. The calculator tells you exactly how many milligrams of THC and CBD end up in each portion.
Raw cannabis contains THCA, not THC. To convert it into active THC, you need to apply heat – a process called decarboxylation. Without it, your edibles will have a fraction of the potency you expect.
Spread your ground cannabis on a baking sheet, cover with foil, and bake at 240°F (115°C) for 45 minutes. Let it cool before infusing. Our calculator assumes you have decarbed properly.
THC and CBD are fat-soluble – they bind to fat molecules during infusion. Your choice of base affects extraction efficiency and flavour.
~90% saturated fat. Bonds exceptionally well with cannabinoids. Works in baked goods, savoury dishes, and capsules. Stays solid at room temperature for easy dosing.
The classic. ~80% fat content, highly effective for extraction. Produces rich, flavourful edibles. Clarified butter (ghee) performs even better.
Great for savoury applications – salad dressings, pasta, dips. Lower saturated fat but still highly effective. Excellent flavour profile.
MCT oil is the go-to for tinctures and sublingual drops – liquid, flavourless, fast-absorbing. High-proof alcohol (Everclear) is traditional for Green Dragon tinctures.
Understanding the milligram output is only useful if you know what those numbers mean in practice.
Body weight, metabolism, tolerance, and whether you have eaten recently all influence your response. The only reliable rule: start low, wait at least two hours, and increase gradually.
When you eat cannabis, your liver converts THC into 11-hydroxy-THC– a metabolite that is significantly more potent and crosses the blood-brain barrier more effectively. This is why edibles take 30 minutes to 2 hours to kick in, last 4–8 hours, and can feel much stronger than the same dose inhaled.
Calculating your dose before cooking – not after – is the most important thing you can do. For more, read our guide: How Long Do Edibles Take to Kick In?
The single biggest cause of weak edibles. Use an oven thermometer – most home ovens run 10–25°F off.
Cannabinoids do not distribute evenly on their own. Stir thoroughly when adding infused oil to batter, or use a blender.
Lab testing varies. Your actual gram may differ by a few percent – another reason to start low.
THC degrades above 300°F. Keep your infusion at 160–180°F. A slow cooker on low is one of the most consistent methods.
Strain through a fine mesh or cheesecloth. Do not squeeze – it adds chlorophyll and bitterness without meaningful potency.
Mathematically precise based on your inputs. Real-world accuracy depends on your THC% accuracy. Lab-tested flower with a certificate of analysis gives the best results.
The legal market standardises on 10 mg THC per serving. For homemade edibles, 5–10 mg is a good target. First-timers should aim for 2.5–5 mg.
Yes. Enter your cannabis details, enter how much butter you are using, and select your unit. The per-teaspoon and per-tablespoon results tell you exactly how much THC is in each spoon.
Yes. Enter 0 for THC% and enter your CBD percentage. The calculator shows total CBD milligrams per serving with no THC calculations.
Use a conservative estimate. Average flower ranges from 15–25% THC. Enter 15% for a safe lower bound — if your flower is stronger, your edibles will be stronger than calculated.
The calculator assumes maximum extraction efficiency regardless of oil type. In practice, higher saturated fat oils extract slightly more, but the difference is small.
A standard dose (5–10 mg) typically lasts 4–8 hours, peaking at 2–3 hours. Higher doses can last 8–12 hours. Metabolism, tolerance, and food intake all influence duration.
Yes — and it is a common beginner mistake. Too much can cause anxiety and disorientation. The best prevention is precise dosing before you cook. If you consume too much, stay calm, stay hydrated, and rest.
Have a suggestion for the calculator? Want to see a new feature? Send us a message.
All calculator results are estimates based on the inputs provided. Real-world potency varies depending on cannabis quality, decarboxylation efficiency, infusion method, and individual body chemistry. Always start with a small serving and allow at least two hours before consuming more. The information on this page is for educational purposes only. Herbistry420 does not condone or encourage illegal activity. Cannabis laws vary by location – it is your responsibility to comply with the laws in your area.
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