Cannascenti — counter sheet
Label-reading cheat sheet
The label, the math, and the batch — distilled from our guide to reading a cannabis label.
Label anatomy
- Strain / cultivar name. The genetics the grower intended — a starting point, not a promise. Names get reused and misapplied.
- THC and CBD percentages. "Total THC" is usually calculated, not measured — see the math below.
- Net weight. The one number that is never ambiguous — check it against what you paid for.
- Harvest and package dates. Cannabis ages; the gap between them affects aroma and character.
- Batch / lot number. Ties your jar to one harvest, one test, one lab report. Two jars with different batch numbers can be meaningfully different products.
- Producer and license number. Who grew it — useful for finding the original lab report.
- Warnings and symbols. Required, not informative — but their absence means it is not a legal product.
The THC math
Raw flower holds THCa, the acidic precursor. Heat converts THCa into THC. Labels usually compute total THC as:
Total THC = (THCa × 0.877) + Δ9-THC
The 0.877 decarb factor accounts for the weight lost as carbon dioxide during conversion. Three cautions: the number describes chemical potential, not experience; lab results vary between labs and samples, so small differences are noise; and optimizing for one number crowds out terpenes, freshness, and minor cannabinoids.
Batch variance
A strain name is a recipe; a batch is the meal. Two harvests of the same genetics can test differently. Shop for batches — growers you trust, fresh harvest dates, terpene profiles you enjoy — not just names.
Five questions for your budtender
- "Can I see the COA for this batch?"
- "When was this harvested?"
- "What are the top terpenes on this batch — not the strain page?"
- "What does your shop mean by indica and sativa?"
- "What is tasting best to you right now?"