3.5 g flower × 1000 × 18% THCA × 0.877 = 552.5 mg THC (theoretical) ÷ 240 ml = 2.30 mg per ml.
Theoretical maximum: it assumes complete decarboxylation (THCA × 0.877) and that every milligram ends up in the food. Real yield is usually lower, which is why you start with one portion and wait. Re-run the maths for your flower →
per millilitre
2.5510 mg
Start with one. Wait two hours.
Ingredients
3.5 g cannabis flower (label THCA around 18%)
240 ml food-grade neutral grain spirit, 75% ABV (150 proof) or higher, where legal to buy
Flower at a different THCA %? Recalculate the infusion; the recipes that use it then need no changes.
Method
Decarboxylate the flower at 115 °C (240 °F) for 35–40 minutes and let it cool completely.
Put the flower in a clean jar, pour over the alcohol, seal, and label the start date.
Image slot · step 2: flower in a sealed jar of alcohol · 1200 × 800
Store in a cool dark cupboard for 3 days, shaking once or twice a day. Longer steeping extracts more chlorophyll (greener, grassier), not more THC.
Image slot · step 3: jar in a dark cupboard with a date label · 1200 × 800
Strain through a coffee filter into a dark dropper bottle. Label with the milligrams per millilitre. Keeps for a year in a cupboard.
Image slot · step 4: straining through a coffee filter into a dropper bottle · 1200 × 800
Dosing notes
Alcohol vapour is flammable. Never warm a tincture near a flame or in a gas-hob kitchen with the hob on; this recipe needs no heat at all.
Measure with a graduated dropper or oral syringe, not by counting drops. A standard 1 ml dropper is one dose unit here.
Taken under the tongue the alcohol stings; stir it into a drink instead.
Can I use vodka?
Standard 40% vodka extracts less and more slowly. If it is all you can buy, steep for two weeks and expect a weaker result than the maths.
Can I make it stronger?
Yes, by using more flower in the same volume. Recalculate with the dosage calculator and re-label; the recipes on this site assume this ratio.
Educational content, not medical advice. Effects vary with body weight, tolerance and what else you have eaten. Label infused food with the milligrams per portion and the date, and keep it away from children and pets.
Same maths as cannabutter, dairy-free, and it sets solid so you can portion it by the gram. Used in the gummies, chocolate bark and peanut butter cups.
