Cannabis Concentrate Dosing Calculator: THC Percent to Milligrams
A concentrate dosing calculator turns THC percent and weight into milligrams. One gram at 70% THC holds 700 mg. A 10 mg serving is the state standard.
Buy a cannabis cooking dosage calculator that works in milligrams of THC per serving and lets you enter your own starting material, not one that hides the math behind a vague strength label. The tool worth having asks for three things: the THC percentage of what you are infusing, the number of servings the batch makes, and your target dose per portion. If a calculator cannot show those inputs and the resulting mg per serving, keep looking. Everything else, including pretty graphics and recipe libraries, is secondary.
What a dosing calculator actually does
A calculator is a unit converter with a loss factor. It takes the weight of your cannabis, multiplies by the potency percentage to get total THC, applies a decarboxylation and infusion recovery factor, then divides by the number of servings. The formula behind a good one looks like this: grams x 1000 x (THC percent / 100) x conversion efficiency x recovery, divided by servings. Two calculators that disagree usually disagree on the loss factors, not on the arithmetic.
What to look for before you trust the output
- A potency field in percent that accepts a typed value from a product label or certificate of analysis.
- Visible handling of decarboxylation conversion and infusion loss, either as an editable field or a stated assumption.
- A serving count you define, not a fixed per tray or per recipe number.
- Output shown both as mg THC per serving and mg THC for the whole batch.
- Unit switching between grams and ounces, cups and milliliters.
- A separate CBD field so isolate or broad spectrum additions do not inflate the THC total.
- Results you can save or print, so a repeat batch is repeatable.
- No dose recommendation baked in that ignores tolerance and body weight.
Parameter bands to sanity check the math
Run any calculator against these ranges before you cook. If the output lands far outside them, the inputs or the assumptions are wrong.
cannabis concentrate dosing calculator
- Flower potency: 15 to 25 percent THC is common for lab tested dispensary flower, and 10 percent or lower for shake and trim. A tool that will not accept values under 10 percent is too rigid.
- Concentrate potency: 60 to 90 percent THC for distillate and shatter. A calculator capped at 30 percent cannot handle these at all.
- Decarboxylation: 220 to 250 F for 25 to 45 minutes is a standard home range, and conversion is never total. Plan on about 70 to 90 percent of THCA converting to THC.
- Infusion recovery: expect 70 to 85 percent of the THC to reach your butter or oil, with the rest bound to plant material you strain out.
- Dose per serving: 2.5 mg for a cautious first attempt, 5 mg for a low dose, 10 mg as the common retail reference serving, and 25 mg or more only for people with established tolerance.
- Fat ratio: 1 cup of butter or oil to 7 to 14 grams of decarbed flower is a normal home range. More fat than that dilutes the dose per tablespoon and makes portions harder to control.
Pitfalls that skew the number
- Treating raw flower weight as if it were pure THC.
- Ignoring decarb loss, eating a weak edible, then doubling the next batch on a guess.
- Forgetting that batter or oil left in the pan still holds cannabinoids.
- Dividing by pan size instead of by the number of pieces you actually cut.
- Adding CBD isolate into the THC total.
- Using a potency figure from an unlabeled bag with no test result behind it.
- Reading the output as a recommendation instead of an estimate.
FAQ
How accurate is a cannabis dosage calculator?
It is as accurate as its inputs. A tested potency number and an honest serving count get you close. A guess on flower strength can be off by half, which is why first batches deserve small portions.
What Is a Good Starting Dose for Edibles? Calculator Guide
Can I use a calculator for concentrates or tinctures?
Only if it accepts potency above 30 percent and lets you set the carrier volume. For tinctures, work out mg per milliliter first, then dose by measured drops rather than by eye.
What is a sensible first dose from a homemade edible?
2.5 mg THC or less, then wait two hours before judging the effect. Edibles arrive later and last longer than inhaled cannabis, so a second piece early in the wait is the usual mistake.
Do I need a lab test to use these tools?
Not required, but a label or certificate of analysis tightens the estimate. Without one, assume mid-range potency and keep portions small.
Why did my batch come out weaker than the calculator said?
Most often incomplete decarboxylation, low infusion recovery, oil left behind in the pan, or pieces cut larger than the serving count assumed.