An ounce of weed is 28 grams. The exact conversion is 28.35 grams, but dispensaries and shoppers round to 28. That makes an eighth 3.5 grams, a quarter 7 grams and a half ounce 14 grams.
In New York, adults 21 and older can carry up to 3 ounces of flower (about 85 grams) and up to 24 grams of concentrate.
Key takeaways
- An ounce of weed is 28 grams (28.35 exactly); an eighth is 3.5 g.
- New York adults 21+ can carry up to 3 oz of flower and 24 g of concentrate.
- Up to 5 lb can be stored securely at home.
Cannabis weight conversion chart
| Common name | Ounces | Grams |
| A gram | 1/28 oz | 1 g |
| An eighth | 1/8 oz | 3.5 g |
| A quarter | 1/4 oz | 7 g |
| A half | 1/2 oz | 14 g |
| An ounce (O, zip) | 1 oz | 28 g |
| New York possession limit | 3 oz | about 85 g |
| A pound | 16 oz | about 454 g |
Why is an ounce of weed 28 grams and not 28.35?
The imperial ounce equals 28.3495 grams. Cannabis sizes grew up around round numbers, so the industry settled on 28 grams per ounce and 3.5 grams per eighth. Licensed products are labeled by net weight in grams, so check the label for the exact amount. New to cannabis? Start with what is cannabis.
How much cannabis can you buy in New York?
You can buy up to the amount you are legally allowed to possess: 3 ounces of flower and 24 grams of concentrated cannabis. Concentrates include vape cartridges, wax, shatter, rosin and similar products. Dispensaries track these limits at checkout, so a single purchase above them will be declined. Planning a first visit? See how to buy weed legally in NYC.
How much cannabis can you carry in New York?
Adults 21 and older can carry up to 3 ounces of cannabis flower and up to 24 grams of concentrated cannabis in public. At home, you may store up to 5 pounds, as long as it is secured and out of reach of anyone under 21.
Carrying more than 3 ounces of flower or 24 grams of concentrate is a violation punishable by a fine of up to $125. Larger amounts, above 16 ounces of flower or 5 ounces of concentrate, become a criminal misdemeanor. For where you can use cannabis, see our guide to New York cannabis laws.
Can you share cannabis with a friend?
Yes, within limits. Adults 21 and older may give up to 3 ounces of flower or 24 grams of concentrate to another adult 21 or older, as long as no money or trade is involved. Selling any amount without a license is illegal.
How many joints can you roll from an ounce?
It depends on the size of each joint. At a typical 0.5 to 1 gram per joint, an ounce rolls roughly 28 to 56 joints. Pre-rolls sold at dispensaries list their weight on the label, often 0.5 g or 1 g each. You can shop flower and pre-rolls at Indoor Treez in Midtown Manhattan and Howard Beach. For THC content per joint, see how much THC is in a joint.
FAQ
How many grams is an eighth? An eighth of an ounce is 3.5 grams.
How many grams is a quarter? A quarter ounce is 7 grams.
How many grams in a half ounce? A half ounce is 14 grams.
How much weed can I legally have in New York? Up to 3 ounces (about 85 grams) of flower and 24 grams of concentrate in public. Up to 5 pounds can be stored securely at home.
Do edibles count toward the possession limit? Yes. Edibles count toward the concentrated cannabis limit based on their THC content. Ask your budtender if you are buying a large amount.