THCA vs THC.
THCA is what the plant makes; THC is what THCA becomes when heated. Raw flower is mostly THCA and is not intoxicating until a lighter, a vaporiser or an oven converts it. A certificate reports both, plus a total THC figure that accounts for the conversion.
Two lines on the same certificate, one of them far more useful than the other. Here is which, and why.
| THCA | THC | Notes | |
|---|---|---|---|
| What it is | The acid form the plant produces | The converted, active form | One becomes the other |
| Intoxicating? | No, in its raw state | Yes | The whole practical difference |
| Where you find it | Raw and cured flower, by weight | Anything heated, and extracts | Curing converts a little; heat converts the rest |
| What converts it | Heat — smoking, vaping, baking | Already converted | Called decarboxylation |
| On a certificate | Reported on its own line | Reported on its own line | Plus a combined total THC figure |
| Which number to compare | Not on its own | Not on its own | Total THC = THC + (THCA × 0.877) |
So which should you actually look at?
- If you are comparing two jars: use total THC. It is the only figure that accounts for what the flower becomes when you actually use it.
- If a label quotes THCA alone: treat it as a potential, not a result, and be wary if the total is not shown beside it.
- If a label adds THCA and THC together raw: that overstates potency. The 0.877 factor exists precisely because mass is lost in the conversion.
Why does raw flower not get you high?
Because almost all of its THC is still locked up as THCA, and THCA is not intoxicating. Nothing has supplied the heat. This is also why edible recipes insist on baking the flower before cooking with it — skip that step and the result does very little.
Where does 0.877 come from?
It is the ratio of the molecular weights. When THCA loses its acid group as carbon dioxide, the molecule gets lighter, so one gram of THCA does not yield one gram of THC — it yields about 0.877 of a gram. State testing rules use the same factor, which is why total THC is comparable between laboratories.
Does a high THCA number mean a strong batch?
It means a high potential, which usually does translate. But potency sets a ceiling rather than describing an experience: two batches with near-identical total THC can feel nothing alike, and the terpene profile predicts that difference better than any cannabinoid number. All 47 analyses are published for every batch here, not just the headline.
Questions people actually ask
What is the difference between THCA and THC?
THCA is the acidic form the cannabis plant produces and it is not intoxicating. THC is what THCA becomes when heat is applied. Raw flower is mostly THCA; smoking, vaping or baking converts it.
Which number should I compare batches on?
Total THC. It combines the THC already present with the THCA multiplied by 0.877, accounting for the weight lost as carbon dioxide during conversion. THCA alone overstates what you will actually get, and adding the two raw figures overstates it further.
Is THCA the same as delta-8 or delta-9?
No. Delta-9 is the common form of THC itself. Delta-8 is a different, less potent isomer usually made from hemp-derived CBD. THCA is neither — it is the acid precursor that becomes delta-9 THC when heated. Cannalab47 sells no delta-8 or delta-9 hemp products.
Why does my flower show 25% THCA and 1% THC?
That is normal and it is what a correctly tested jar looks like. Curing converts a small amount; the rest converts when you heat it. The total THC line on the certificate is the one that tells you what to expect.
