How to Identify Dosage on THC Labels: A Step-by-Step Guide
Learn to read THC labels correctly: find servings per container, THC per serving, convert THCA, and verify lab results to dose accurately.
Reading a cannabis concentrate label means checking four items in order: total THC, milligrams per serving, total milligrams per package, and the batch lab results. Total THC, not THC-A, is the number that predicts potency because THC-A converts to THC when you apply heat. Once you match the milligram serving to your tolerance and confirm the product passed pesticide and solvent testing, the rest of the label is supporting detail.
What are the most important numbers on a concentrate label?
Potency and serving data sit at the top of compliant labels because they drive dosing. Look for total THC percentage, milligrams of THC per serving, and total servings per package.
- Total THC (%): activated THC plus the THC-A that converts when heated.
- THC-A (%): the raw acid form, not psychoactive until decarboxylation.
- mg THC per serving: the dose in one hit, dab, or portion as defined by the producer.
- Total mg THC per package: the full container. A 1 gram jar at 70% THC holds about 700 mg.
- Other cannabinoids: CBD, CBG, CBN, and CBC percentages, useful when you want a specific effect profile.
How do you convert THC-A to total THC?
Total THC = THC + (THC-A x 0.877). The 0.877 multiplier reflects the carbon dioxide released when THC-A loses its acid group during heating. A concentrate with 5% THC and 70% THC-A lands near 66% total THC.
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What do serving size and servings per package mean for dosing?
Concentrate servings are measured in milligrams, and a single serving often sits between 5 mg and 10 mg of THC for a low-tolerance consumer. Experienced users may take 25 mg or more in one dab, which is why the package total matters as much as the percentage. Many states cap a single adult-use concentrate package at 1,000 mg of THC.
what to look for on marijuana product labels
How do you read extraction and consistency terms?
The extraction line tells you how cannabinoids were pulled from the plant and how much residual material may remain. Common terms you will see on a jar:
- Live resin: made from fresh frozen plant material, higher terpene retention.
- Rosin: solventless, pressed with heat and pressure.
- Distillate: refined to near-pure THC, usually with terpenes added back.
- Hydrocarbon or BHO: butane or propane extraction, requires solvent testing.
- CO2: compressed carbon dioxide extraction.
- Cured resin: made from dried and cured flower.
Which lab results should you check?
A full-panel test covers potency, terpenes, pesticides, residual solvents, heavy metals, microbials, and mycotoxins. Labels often print a QR code or batch ID that links to the certificate of analysis from the testing lab. If a package shows potency only, the product was not screened for contaminants.
What do the dates, batch number, and license number tell you?
The harvest or manufacture date signals freshness, and terpenes fade over months on the shelf. The batch or lot number ties your exact package to its lab report, which matters if a recall is issued. The license number confirms the product moved through a state-regulated supply chain rather than the unregulated market.
Is a higher THC percentage always better?
No. Terpene content, cannabinoid mix, and extraction method shape the experience as much as raw potency. Products above 90% THC often strip out terpenes, while a 60% live resin can deliver a fuller effect.
Why do two packages of the same product show different THC numbers?
Cannabis is a plant, not a formula. Each harvest batch varies, and labs report the specific sample tested, so a few points of drift between batches is normal.
What should you do if a concentrate label is missing information?
Ask the dispensary for the certificate of analysis before you buy. Missing potency numbers, missing batch IDs, or marketing claims with no lab data are red flags for unregulated products.