How to Read a Cannabis Label: THC, CBD, and Dosing Explained
Learn how to read a cannabis label: total THC vs. THCA, milligrams per serving, terpenes, batch numbers, and COAs, so you know the dose before you buy.
The first thing to read on a cannabis concentrate label is the batch-specific cannabinoid panel, not the strain name or the banner art. That panel is the only section tied to the exact gram in your hand, and it is where you find total THC, THCA, and the figures you need to dose. Judge every other line on the package by three tests: is it batch-specific, is it measurable, and can you verify it with a license number or lab name. The sections below cover each label element, what it does well, and where it misleads.
Concentrates list both THCA and delta-9 THC because raw resin holds most of its potency as THCA. Heat converts THCA into THC, which is why a dab hits harder than the number printed next to THC alone suggests. To compare two jars, do the math yourself: multiply THCA by 0.877, then add the delta-9 THC figure. A label showing 70% THCA and 5% THC lands near 66% total THC.
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Best for: anyone comparing two grams at the counter. Divide total THC by 100 and multiply by the net weight in milligrams to estimate the THC in the package.
How to Read Cannabis Edible Labels for Dosage
Terpenes drive smell and much of the experience you are paying for. Strong labels name individual terpenes (myrcene, limonene, caryophyllene, pinene, linalool) and give a total terpene percentage. A total near zero suggests the aromatic compounds were stripped or never measured, which points toward distillate with flavor added back. Rosin and live resin keep more of the original profile, so the terpene total tends to run higher.
what to look for on marijuana product labels
Best for: flavor chasers comparing rosin, live resin, and cured resin on the same shelf.
Find the process line: hydrocarbon, ethanol, CO2, or solventless (rosin, ice water hash). Solventless means no chemical solvent was used, though heat and pressure still count as processing. The phrases full spectrum and live resin have no settled legal definition in most states, so check the cannabinoid and terpene rows to see whether the claim holds up.
Best for: buyers who care about taste and about what was used to pull the resin off the plant.
A complete label carries a batch or lot code, a cultivation or manufacturing license number, the testing lab, a harvest or packaging date, and the state universal symbol. The date matters because THC degrades into CBN over months, and old stock tastes flatter. Match the batch code on the jar to the code on the lab report before you trust the potency panel.
Best for: verifying that the test result belongs to the unit you are holding.
Many legal states cap a single edible serving at 10 mg THC. Concentrates are dosed by the user instead, so the label hands you the tools: net weight in grams and total THC. A 1-gram jar at 66% total THC holds about 660 mg THC. A 10 mg dose works out to roughly 15 mg of concentrate, which is far too small to eyeball. Use a milligram scale, and keep the math written down somewhere.
No package states how a concentrate will affect you. Federal law does not review these labels, so accuracy rests on state testing rules and the lab that ran the sample. Pesticide, residual solvent, heavy metal, and microbial results live on the certificate of analysis rather than the jar. Ask the shop for the COA and check that its batch code matches.