The short answer
Most cannabis seltzers sold in legal US dispensaries contain 2 to 10 milligrams of THC per can. A few high-dose brands push 20, 50, or even 100 mg, and some light "session" cans sit at 1 or 2 mg. If the label does not say, assume you are holding a standard 5 mg dose, the same amount in a typical single gummy.
What the numbers usually look like
- 1 to 2 mg: light, social cans. A mild lift, not a full high.
- 5 mg: the standard adult dose in most states and the right starting point for a beginner.
- 10 mg: the legal single-serving cap in several states. One can equals one full edible serving.
- 20 to 100 mg: craft or medical-style cans. Not a starter product, and often sold as multi-serving.
Serving size is where people slip
A can that reads "2 servings" holds double what you think. I check the back panel for total THC per container, not the bold number on the front. A 10 mg can labeled as two servings is really 5 mg per pour, and a 100 mg can split four ways is a 25 mg ride per person.
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Why a seltzer hits faster than a gummy
Beverage THC is usually nano-emulsified, meaning the cannabinoids are broken into tiny droplets that disperse in water. Your gut absorbs that mix faster than the oil and butter base in a brownie. Most people feel a seltzer in 15 to 30 minutes, while a gummy often takes an hour. The trade-off is duration. A seltzer tends to fade in 2 to 4 hours, and a fat-based edible can run 6 hours or longer.
What the law caps
Colorado and Washington both limit retail edibles to 10 mg of THC per serving and 100 mg per package. Canada caps an entire package of any edible, beverages included, at 10 mg. So a Canadian seltzer cannot legally be a 50 mg can even if a brand wanted to sell one. State limits are why you rarely see single cans above 10 mg on a recreational shelf.
Picking your number
No tolerance? Start at 2 mg and wait two hours before opening a second can. Moderate tolerance, 5 to 10 mg. Daily user, 10 mg reads as a light afternoon. The mistake I see most is someone drinking a 10 mg can the way they drink a beer, finishing it in ten minutes, then getting surprised at minute forty. Sip it, set it down, and let the first half do its work before you pour the rest.
What I check before buying
- Total THC per container, plus the serving count.
- Milligrams per serving, since that is what your body actually gets.
- Whether CBD is in the mix, because it can soften the edge of a higher dose.
- Batch or packaged date, since older cans can lose potency.
Get in the habit of reading one can closely and the rest get easy. The math is simple once you know whether the number on the front is per can or per serving.