A THC percentage chart is a rough ladder for comparing products: flower usually lands between 12% and 30% THC, vape cartridges and concentrates run from about 60% to 90%, and edibles are measured in milligrams per serving rather than percent. The number tells you how much THC is in the product by weight. It does not tell you how high you will feel.
Quick THC percentage chart by product type
- Flower (smokable bud): 12% to 30%. Most jars on a dispensary shelf sit between 18% and 25%.
- Pre-rolls: 12% to 25%. Many are rolled from trim or shake, so the number can land below the jarred flower from the same grower.
- Kief and hash: 20% to 60%.
- Vape cartridges: 65% to 90%. Distillate carts tend to sit at the top of that range.
- Concentrates (wax, shatter, budder, live resin, rosin): 60% to 90%.
- RSO and full-extract oils: 50% to 80%.
- Edibles: labeled in milligrams, not percent. A single serving in most legal US states is 5 mg or 10 mg, and a recreational package tops out at 100 mg.
- Tinctures: labeled by milligrams per bottle or per dropper.
What the percentage actually measures
On a lab-tested label you will often see three numbers: THC, THCA, and total THC. Raw cannabis holds most of its THC in acid form, THCA, which is not intoxicating on its own. Heat, from a lighter, a vaporizer, or an oven, converts THCA into THC. Labs apply a conversion factor of 0.877 to account for the carbon dioxide that leaves during that reaction.
So total THC works out to THC plus (THCA multiplied by 0.877). If a label lists 1% THC and 25% THCA, the total is roughly 23%. Some states require the total on the package. Others print the raw numbers and leave the math to you, which is why two jars with the same advertised potency can look different on paper.
Cannabis THC Content: Meaning and Effects Explained
The percentage is a weight ratio. In 1 gram of 20% flower there are about 200 mg of THC, though how much of that reaches your bloodstream depends on how you consume it. Smoking and vaping deliver a large share of the dose within minutes. Swallowing cannabis sends it through the liver, where THC converts into a stronger metabolite, 11-hydroxy-THC, and the effects arrive late.
Why a higher number is not automatically better
I have watched plenty of shoppers grab the highest jar on the shelf and come back disappointed. Potency is one axis, and it is far from the only one. Terpenes shape the smell and the character of the experience. Minor cannabinoids like CBD and CBG can soften the edge of a strong THC dose. Your own tolerance, your mood, and whether you ate beforehand all move the needle too.
Researchers still argue about how much of the experience comes from the combination of compounds rather than THC alone. That debate is not settled. What is clear from user reports and lab data is that a 30% flower and a 20% flower can feel surprisingly similar when you smoke the same amount, and the 30% one costs more.
High potency also raises the odds of an unpleasant first hour: racing thoughts, dry mouth, a spike of anxiety. That risk climbs with concentrates, where a single dab can carry 40 mg or more of THC, several times a beginner edible serving.
How I use the chart on a menu
- Pick a category first. Decide whether you want flower, a vape, an edible, or a concentrate. The percentage ranges barely overlap.
- Match the number to your experience. New, or coming back after a long break? Flower in the mid teens to low 20s, or a 5 mg edible, is a reasonable landing spot.
- Look at the dose, not just the percent. A 25% pre-roll that weighs half a gram holds less THC than a 20% joint that weighs a full gram.
- Ask about the batch. Freshness, cure, and harvest date change how a strain smokes more than one or two points of THC.
- Go slow with anything above 60%. Concentrates and carts are not beginner formats for most people.
Edibles follow a different chart
Percentage does almost nothing for you on an edible label. What matters is milligrams per serving and how many servings are in the package. A chocolate bar might read 100 mg total and break into 10 pieces of 10 mg each. Eat the whole thing by accident and you are in for a long evening. Wait at least two hours before deciding the dose was too small.
Labels are close, not exact
Testing has improved a lot since the early medical days, but it is not perfect. Independent checks of edible products have found labeled THC amounts that differed from lab results by more than 10%, in both directions. State regulators set allowable variance, and batches get retested, but a 22% label might be a 19% jar. Treat the number as a bracket, not a promise.
One more thing: percent THC is not a measure of quality, and it never was. It tells you how much of one compound is present. The rest of the decision, how it smells, how it tastes, how it makes you feel, happens after you open the bag.