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PL Most edible calculators multiply your flower by its THC percentage and stop there. That answer is wrong in the same direction every time: it assumes decarboxylation is perfect and that infusion loses nothing. This one shows the arithmetic and lets you set both.
Your infusion
The two losses everyone else skips
Your recipe
The arithmetic, written out
Four numbers and one multiplication chain. Nothing here is hidden in the code.
- Flower to milligrams. Grams times 1000.
- THCA present. Times the THC percentage on the label.
- Decarboxylation. Times 0.877, the mass ratio of THC to THCA, because the molecule loses a carboxyl group. Then times your decarb efficiency, because no home oven converts everything. 0.80 is a fair default.
- Infusion. Times your infusion efficiency. A good butter or oil infusion recovers roughly 0.60 to 0.70 of what is in the plant. 0.65 is a fair default.
- Per serving. Divide by the number of servings, after applying the fraction of the infusion the recipe actually used.
Why the number you get here is lower
Take 14 grams at 20 percent. A calculator that skips both steps reports 2,800 mg. Apply only the 0.877 conversion and it is 2,456 mg. Apply a realistic decarb and infusion and it is about 1,277 mg. Same flower, less than half the answer, and the lower number is the one your body meets.
| What is applied | Result for 14 g at 20 percent |
|---|---|
| Nothing, flower times percentage | 2,800 mg |
| The 0.877 mass ratio only | 2,456 mg |
| 0.877, decarb 0.80, infusion 0.65 | 1,277 mg |
Reading the result
| Per serving | Who it suits |
|---|---|
| 1 to 2.5 mg | first time, or microdosing |
| 2.5 to 5 mg | light, most people feel this |
| 5 to 15 mg | moderate, for regular users |
| above 15 mg | strong, easy to overshoot with edibles |
Edibles reach you through the liver, so onset is 30 to 120 minutes and the effect lasts 4 to 12 hours. Wait two hours before deciding a dose was too small. Keep them labelled and away from children and pets.
What this calculator assumes, and where it can be wrong
- The label percentage is right. Flower is often tested optimistically.
- Your decarb hit its temperature. Too cool leaves THCA behind; too hot turns THC into CBN.
- The infusion was evenly mixed, so every spoonful carries the same dose. Lecithin helps.
- Nothing here accounts for your tolerance, your body or what you last ate.
This is an estimate with its uncertainty stated, which is the honest version of a calculator. Start low.
Working out the infusion itself is a separate job: how to make cannabutter, the decarboxylation temperature chart, and the potency calculator for tinctures and oils by volume.
A machine that holds the decarboxylation and infusion temperatures for you removes most of the guesswork in the two efficiency figures above: the NOIDS Herb Lab.
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