How Many Grams in an Ounce of Weed? Eighth, Quarter, Half
An ounce of weed is 28 grams. Full chart from a gram to a pound, how many joints are in an ounce, and how much you can carry in BC.
How many grams in an ounce of weed? There are 28. A true ounce is 28.35 grams, but cannabis sellers in Canada round it to 28 g. Smaller amounts follow from that: an eighth is 3.5 g, a quarter is 7 g and a half ounce is 14 g. In British Columbia, adults 19+ can carry up to 30 grams of dried cannabis in public, which is just over one ounce.
Key takeaways
- 1 ounce (oz) = 28 g, ½ oz = 14 g, ¼ oz = 7 g, ⅛ oz = 3.5 g.
- 1 pound (lb) = 448 g, or 16 ounces.
- BC’s public possession limit is 30 g of dried cannabis, or the equivalent.
- Buying bigger sizes usually lowers the price per gram.
How many grams in an ounce? Weed measurements chart
Cannabis is one of the few things in Canada still sold in a mix of metric and imperial units. Here’s the full conversion, using the 28-gram ounce that shops use:
| Name | Ounces | Grams | Also called |
|---|---|---|---|
| Gram | about 1/28 oz | 1 g | “a g” |
| Eighth | ⅛ oz | 3.5 g | “an eighth”, “8th” |
| Quarter | ¼ oz | 7 g | “a quarter”, “Q” |
| Half ounce | ½ oz | 14 g | “a half”, “half O” |
| Ounce | 1 oz | 28 g | “an O”, “a zip” |
| Quarter pound | 4 oz | 112 g | “a QP” |
| Half pound | 8 oz | 224 g | “a HP” |
| Pound | 16 oz | 448 g | “a P”, “an LB” |
Why is an ounce of weed 28 grams and not 28.35?
An imperial ounce is 28.3495 grams. Cannabis sellers round down to 28 g because it divides neatly into halves, quarters and eighths: 14, 7 and 3.5 grams. It’s a long-standing industry convention in Canada and the US, and it’s what you’ll see on almost every menu.
The same rounding carries up the scale: a pound is sold as 448 grams (16 × 28) rather than the true 453.6 grams.
How much is an eighth, a quarter and a half?
An eighth (3.5 g)
The most common size for trying a new strain. It’s enough to sample the flavour and character without committing to a larger amount.
A quarter (7 g)
A good middle ground if you’ve found a strain you like. Most shops price a quarter slightly lower per gram than an eighth.
A half ounce (14 g)
Popular with regular consumers. You’ll usually see a clear saving per gram compared with smaller sizes.
An ounce (28 g)
The best value per gram for most people. An ounce is also the size where Mix & Match bundles come in: some shops let you split an ounce across several strains or products instead of buying one.
How many joints are in an ounce?
It depends on how big you roll them:
- At 0.5 g per joint: about 56 joints per ounce.
- At 0.75 g per joint: about 37 joints.
- At 1 g per joint: 28 joints.
Most pre-rolls sold in Canada are 0.5 g or 1 g. If you’d rather not roll your own, see our pre-rolls.
How much weed can you carry in BC?
In British Columbia, adults 19 and older can possess up to 30 grams of dried cannabis (or the equivalent) in public. That’s the federal public possession limit under the Cannabis Act, and BC follows it.
For other products, Canada uses equivalents. One gram of dried cannabis is treated as equal to:
| Product | Equal to 1 g dried | Equal to 30 g dried |
|---|---|---|
| Concentrates (solid or liquid) | 0.25 g | 7.5 g |
| Fresh cannabis | 5 g | 150 g |
| Edible products (solid) | 15 g | 450 g |
| Liquid products (beverages) | 70 g | 2.1 kg |
Rules can change, and limits at home or in a vehicle have their own conditions. Check the Government of BC cannabis page for the current rules.
How to save money by buying bigger sizes
Prices per gram drop as the size goes up, because a single larger package costs less to weigh, pack and deliver than several small ones. A simple way to compare is to divide the price by the grams:
- Note the price of each size on the product page.
- Divide by the grams: 3.5, 7, 14 or 28.
- Compare the price per gram, then pick the size you’ll actually use while it’s fresh.
Bud stays at its best for a few months when stored in an airtight jar in a cool, dark place, so buy in amounts you’ll finish in that time.
Compare sizes on our flower menu, including AAAA strains, or build a Mix & Match bundle. Wondering what the letters mean? Read AAAA vs AAA weed.
Frequently asked questions
How many grams is a quarter of weed?
A quarter ounce is 7 grams.
How many grams is a half ounce?
A half ounce is 14 grams.
How many grams are in a zip?
A “zip” is slang for an ounce, which is 28 grams.
Can I carry an ounce of weed in BC?
Yes. Adults 19+ in BC can carry up to 30 grams of dried cannabis in public, which is slightly more than one 28-gram ounce.
How many grams are in a pound of weed?
Cannabis sellers count a pound as 448 grams (16 ounces of 28 g). A true pound is about 453.6 grams.
19+ only. This guide is general information for adults of legal age in Canada, not medical advice. Start low, go slow, and never drive high.
