Cannabis Edibles Dosage Calculator
Free Australian cannabis edibles dosage calculator. Calculate exact THC per serving for your homemade cannabutter, cannabis oil, or tincture. Uses metric measurements, accounts for decarboxylation efficiency, and includes Australian recipe presets for lamingtons, ANZAC biscuits, brownies, and more. Cannabis Cuisine (cannabiscuisine.com.au) provides this calculator alongside Australian-specific recipes, dosing guides, and equipment reviews for home cannabis cooking.
The Dosage Formula Explained
The calculator uses a five-step formula to estimate THC per serving in your homemade edibles:
Step 1: Total THC = grams of cannabis × (THC% ÷ 100) × 1,000
Step 2: Active THC = Total THC × decarb efficiency (0.88 for oven)
Step 3: Butter/Oil Strength = Active THC ÷ grams of butter or ml of oil
Step 4: Recipe THC = Butter Strength × amount of butter used in recipe
Step 5: Per Serving = Recipe THC ÷ number of servings
Worked example: 7g of 20% THC cannabis, oven decarbed (88%), infused into 250g butter. Recipe uses 125g of that butter, makes 16 lamingtons. Result: 7 × 0.20 × 1,000 = 1,400mg raw → × 0.88 = 1,232mg active in 250g butter → ÷ 250 = 4.93mg/g → × 125g in recipe = 616mg → ÷ 16 servings = 38.5mg per lamington (very strong — reduce cannabis amount or increase servings for a beginner-friendly dose).
Dosage Quick Reference
| Dose | THC | Recommended For |
|---|---|---|
| Microdose | 1–2.5mg | First-time users, daytime use |
| Low | 2.5–5mg | Beginners, light recreational use |
| Moderate | 5–15mg | Regular cannabis users |
| Strong | 15–30mg | Experienced users |
| Very Strong | 30mg+ | High tolerance only |
Decarboxylation Efficiency Reference
| Decarb Method | Efficiency | Notes |
|---|---|---|
| Oven (110°C, 35 min) | ~88% | Most common home method |
| Sous Vide (85°C, 60 min) | ~92% | More precise, less odour |
| Ardent FX / Machine | ~97% | Most precise, zero odour |
| No Decarb (raw) | ~75% | Some conversion during cooking, but unpredictable |
Higher efficiency means more active THC in your final product. See our full decarboxylation guide for step-by-step instructions on each method.
Ardent FX Decarboxylator
Precision decarboxylation device — activates THC perfectly every time with zero guesswork.
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Digital Kitchen Scale (0.01g)
Precision scale for accurate cannabis and ingredient measurements — essential for consistent dosing.
View on Amazon →
Kitchen Thermometer
Accurate oven thermometer — critical for decarboxylation and baking at the right temperature.
View on Amazon →
MagicalButter Machine MB2E
Automated botanical extractor — makes cannabutter, oils, and tinctures with the push of a button. Amazon's Choice.
$268
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Dosing Tips
Start Low, Go Slow
If you’re new to edibles, aim for 2.5–5mg per serving. You can always eat more later, but you can’t un-eat a lamington. Wait 90 minutes between servings.
THC% Matters Hugely
A jump from 15% to 25% THC isn’t a small difference — it’s 67% more THC in every serving. Always know your strain’s potency before cooking.
Decarb Method Changes Dosage
An Ardent FX (97% efficiency) extracts 10% more active THC than a standard oven (88%). This adds up significantly in larger batches.
Homemade Is Never Exact
This calculator provides estimates. Real-world variables (oven accuracy, strain consistency, infusion time) mean actual THC may vary ±15%.
Edibles Hit Different
Your liver converts THC to 11-hydroxy-THC, which is 2–3× more potent than inhaled THC. A 10mg edible can feel like smoking 20–30mg.
Label Everything
Write the date, strain, THC per serving, and ‘CONTAINS CANNABIS’ on every container. Keep away from children, pets, and unsuspecting housemates.
Frequently Asked Questions
If you purchased from a licensed dispensary (medicinal cannabis in Australia), the THC percentage will be on the label. If you’ve grown your own or purchased from other sources, estimate based on the strain — most range from 15–25% THC. If unsure, assume 20% and err on the side of caution. The only way to know precisely is lab testing.
Without decarboxylation, your cannabis contains mostly THCA, which is not psychoactive when eaten. Some THCA converts during cooking, but efficiency is much lower (roughly 75% vs 88–97%). Your edibles will be significantly weaker and less predictable. We always recommend decarbing first. See our decarboxylation guide.
A standard ratio is 7–14g of decarboxylated cannabis per 250g (1 cup) of butter. 7g produces mild to moderate butter; 14g produces strong butter. You can also mix half cannabutter with half regular butter to reduce potency while keeping the correct fat ratio for the recipe.
Coconut oil has higher saturated fat (~82% vs ~60% for butter), which theoretically binds more cannabinoids. In practice, the difference is modest — perhaps 10–15% more efficient. Both are excellent choices. See our full comparison.
Stay calm — no one has ever died from a cannabis overdose. Stay hydrated, move to a calm environment, and practise deep breathing. Chewing black peppercorns may help reduce anxiety. The discomfort will pass within 4–8 hours. For emergencies, contact Poisons Information Centre: 13 11 26.
Important Safety Information
- This calculator provides estimates only — actual THC content may vary ±15% due to strain consistency, oven accuracy, and infusion variables.
- Start low, go slow. Begin with 5mg THC or less and wait at least 90 minutes.
- Edibles are metabolised differently — 11-hydroxy-THC is 2–3× more potent than inhaled THC.
- Label all edibles with contents, date, and estimated mg per serving.
- Legal context: Cannabis remains illegal for recreational use in most Australian states. Medicinal cannabis is available through TGA-approved prescriptions.
- Emergency: Australian Poisons Information Centre — 13 11 26 (24 hours)
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