Last updated: July 5, 2026
Quick Answer
There are 28 grams in an ounce of weed (28.35 grams exactly, rounded down to 28 by convention). An eighth is 3.5 grams, a quarter is 7 grams, and a half ounce is 14 grams. Buying by the ounce is almost always the cheapest way to buy cannabis per gram.
Key Takeaways
- 1 ounce = 28 grams; “zip” is slang for a full ounce.
- An eighth (3.5g) is the most common purchase size; a quarter is 7g; a half is 14g.
- Canada’s public possession limit is 30 grams, so one ounce is legal to carry.
- Price per gram drops sharply as you size up — ounce deals offer the best value.
How Many Grams Are in an Ounce of Weed?
An ounce is technically 28.3495 grams, but the cannabis industry rounds it to 28 grams. Every smaller size you see at a dispensary is a fraction of that ounce, which is why weed math looks odd at first — it is imperial measurements broken into halves, quarters and eighths.
Weed Measurement Chart
| Amount | Grams | Joints (approx.) | Typical online price (CAD) |
|---|---|---|---|
| Gram | 1 g | 2 | $7–$15 |
| Eighth | 3.5 g | 7 | $20–$45 |
| Quarter | 7 g | 14 | $35–$80 |
| Half ounce | 14 g | 28 | $60–$140 |
| Ounce (zip) | 28 g | 56 | $99–$250 |
Prices vary by grade — see our AAA vs AAAA grading guide and the full 2026 weed price guide for what drives the range.
What Is an Eighth, Quarter and Half?
An eighth (3.5g) is an eighth of an ounce — enough for about seven half-gram joints and the standard “try a new strain” size. A quarter (7g) suits regular weekend smokers, and a half ounce (14g) is where per-gram pricing starts to drop meaningfully.
What Does “Zip” Mean?
A zip is one full ounce — 28 grams. The name likely comes from Ziploc bags, which conveniently hold exactly an ounce of flower. When someone prices “a zip,” they mean the per-ounce rate.
How Long Does an Ounce Last?
For a daily smoker using about a gram per day, an ounce lasts roughly a month. Occasional weekend users can stretch a zip for two to three months — just store it properly in an airtight jar away from light so the last bowl is as good as the first.
Frequently Asked Questions
How many eighths are in an ounce?
There are 8 eighths in an ounce. Each eighth is 3.5 grams, and 8 × 3.5g = 28 grams.
Is it legal to carry an ounce of weed in Canada?
Yes. Adults may carry up to 30 grams of dried cannabis in public, so a 28-gram ounce is within the legal limit.
How many joints can you roll from an ounce?
At about 0.5 grams per joint, an ounce rolls roughly 56 joints. Rolling 1-gram joints gives you about 28.
Why is buying an ounce cheaper per gram?
Dispensaries discount larger amounts because packaging and handling costs stay flat. Online ounce deals often cost 40–50% less per gram than buying single grams.
Bud Cargo products are intended for adults of legal age. Please consume responsibly.
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