The top pick for most shoppers is cured flower in the 18 to 25% THC range, because it sets the baseline that every other format on a cannabis potency chart is measured against. Flower is sold with a tested THC percentage by weight, it is simple to dose in small increments, and the same number lets you compare a strain on a menu against a vape or an edible. The chart below sorts the common formats by potency and pairs each number with what it actually means for onset, duration and dose control.
What a Potency Chart Actually Measures
THC percentage is a share of total weight, so the gram you buy contains a fixed amount of cannabinoid. One gram of flower at 20% THC holds about 200 mg of THC. One gram of distillate at 85% holds about 850 mg. A 0.5 g pre-roll at 22% carries roughly 110 mg, which is more than ten standard edible servings in a single smoke.
That math explains the most common bad experience in legal cannabis: a shopper compares a 90% vape to a 20% flower and assumes the vape is four and a half times stronger per session. It is stronger per gram, and per puff, but the flower joint delivers a much larger total dose than one 10 mg edible. Read the percentage and the package weight together, then look at the serving size on the label.
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Three criteria matter when you compare types:
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- Dose control: can you measure a small, repeatable amount?
- Onset and duration: how fast it hits and how long it holds.
- Label reliability: how closely the tested number matches what you feel.
Flower and Pre-Rolls: 15 to 30% THC
Cured flower sits in the widest band on the chart. Lower-potency strains run 12 to 17%, mid-range sits at 18 to 22%, and high-potency cultivars reach 23 to 30%. Pre-rolls follow the same range because they are the same material, though a joint or blunt adds a fixed total dose that is hard to split.
Pros
- Tested percentage by weight is easy to convert into milligrams
- Effects arrive within minutes, so you can stop early
- Small bowls and one-hitters allow fine dose steps
- Full terpene and cannabinoid profile, not just THC
Cons
- Smoke irritates airways
- Pre-rolls are a poor choice for microdosing
- THC degrades with heat, light and age
Best for: anyone who wants fast feedback and control. Choose 15 to 18% for a first purchase, and step up only after you know how a single bowl treats you.
Vape Cartridges and Disposables: 65 to 90% THC
Cartridges concentrate the cannabinoids and cut the plant material. Distillate carts typically test 80 to 90%, live resin and cured resin carts land around 65 to 80%, and rosin carts sit near the lower end of that band. A single draw is small, which makes carts feel gentle even at high percentages.
Pros
- High potency with a low per-puff dose
- Near-instant onset
- Discreet and portable
- No combustion byproduct
Cons
- Easy to overuse because each puff is small
- Distillate carts often carry fewer native terpenes
- Hardware and oil quality vary by producer
Best for: experienced consumers who want a controlled hit during the day, and anyone who needs to avoid smoke.
Concentrates: 60 to 95% THC
Wax, shatter, budder and live resin commonly test 70 to 90%. Solventless rosin tends to sit at 60 to 80%, while distillate and THC isolate push past 90%. Hash and kief are the mild end of this family, with traditional hash around 25 to 45% and kief at 40 to 60%.
Pros
- Highest potency per gram of any inhalable format
- Fast onset
- Preserves terpenes when the extract is full-spectrum
Cons
- Dose is difficult to eyeball, and a rice-grain-sized dab is plenty
- Rapid tolerance buildup
- Requires a rig or vaporizer and some technique
Best for: high-tolerance consumers and medical patients who need a large dose from a small amount of material. Skip this tier as a first purchase.
Edibles: 5 to 10 mg THC per serving
Edibles are the one category where the chart reads in milligrams, not percentages. Regulated packages in legal US markets typically cap a serving at 10 mg THC and a full package at 100 mg, and gummies are often scored into 5 mg or 2.5 mg pieces. The percentage on the box tells you almost nothing useful; the milligrams per serving tell you everything.
Pros
- Precise, repeatable dosing
- Long duration, often four to six hours
- No respiratory exposure
Cons
- Slow onset of 30 minutes to two hours invites accidental redosing
- Effects are difficult to reverse once they begin
- Potency can feel stronger than the milligram number suggests
Best for: sleep, long events and anyone who wants a measured dose without smoking. Start at 2.5 to 5 mg and wait a full two hours before taking more.
Tinctures, Capsules and Beverages: 2.5 to 10 mg per dose
Oil tinctures and capsules usually deliver 2.5 to 10 mg per drop, dropper or capsule, with bottles ranging from 100 mg to 1000 mg total. Beverages are formulated for fast uptake and often hit in 15 to 30 minutes, faster than a chew.
Pros
- Smallest measurable dose steps on the chart
- No sugar load compared with candy
- Tinctures can be titrated drop by drop
Cons
- Oil tinctures absorb inconsistently under the tongue
- Beverage effects can arrive faster and fade faster than expected
- Bottle totals require arithmetic if you want a specific milligram
Best for: beginners, daily low-dose users and patients who track milligrams closely.
Matching the Type to Your Tolerance and Setting
- First purchase: flower at 15 to 18% or a 5 mg edible.
- Daytime focus: a low-dose vape draw or a 2.5 mg capsule.
- Evening and sleep: a 10 mg edible taken two hours before bed.
- High tolerance: live resin dabs or a full-spectrum rosin cart.
- Medical dosing: tinctures or capsules, where every milligram is labeled.
One last note on the numbers: potency labels are lab results, not guarantees. Testing methods and product age move the true figure, so treat any chart as a starting range and adjust from your own response.