Ontario's 30-Gram Limit, Explained
What counts toward Ontario's 30-gram public possession limit, how edibles, drinks and concentrates convert, and how to check your total.
Tyler Lemieux
October 22, 2026 · 2 min read
In Ontario, adults 19 and older can carry up to 30 grams of dried cannabis, or the equivalent, in public at any time. That rule sounds simple until you're carrying a pack of pre-rolls, a few drinks and a box of gummies. Here's how to work it out.
What "in public" means
The limit applies to what you have on you outside your home: in your pocket, your bag or your car. Ontario's rules don't set the same limit for cannabis kept at home, but personal-use and home-grow rules still apply. See Ontario Cannabis Laws for the full picture.
The equivalents
Not everything is sold as dried flower, so the law converts other formats into a "dried equivalent." One gram of dried cannabis equals:
| Format | Amount equal to 1 g dried |
|---|---|
| Fresh cannabis | 5 g |
| Edibles (solid) | 15 g |
| Liquids (drinks, tinctures) | 70 g |
| Concentrates (solid or liquid) | 0.25 g |
| Seeds | 1 seed |
Working out your total
To convert anything to its dried equivalent, divide its weight by the number in the table.
| You're carrying | Calculation | Dried equivalent |
|---|---|---|
| 7 g dried flower | 7 ÷ 1 | 7 g |
| 10 pre-rolls × 0.5 g | 5 ÷ 1 | 5 g |
| Four 355 ml drinks | 1,420 ÷ 70 | about 20.3 g |
| A 1 g vape cartridge | 1 ÷ 0.25 | 4 g |
| A 150 g box of chocolate | 150 ÷ 15 | 10 g |
Add them up. The flower, pre-rolls, drinks and vape cartridge above already come to about 36 g, which is over the limit before you even add the chocolate.
Common surprises
- Edibles are counted by product weight, not THC. A heavy brownie with little THC can count for more than a light gummy with more.
- Concentrates are counted at four times their weight. A single gram of hash or vape oil counts as 4 g.
- Seeds count one each. That's rarely an issue, but a pack of 30 seeds would be 30 g on its own.
- Your car counts as public. Cannabis in your vehicle should also be sealed or packed away. See Cannabis and Driving in Ontario.
Practical tips
- Carry what you need, not your whole supply.
- Keep the packaging. Net weight is printed on the label, which makes the math easy.
- When in doubt, leave some at home.
For where you can actually use what you're carrying in the city, see Where You Can (and Can't) Smoke Cannabis in Sudbury.
