An eighth is 1/8 of an avoirdupois ounce, 3.54 g, rounded to 3.5 g in retail. It is the most common retail size for flower in North America, and prices are often quoted "per eighth".
In practice
Because flower keeps losing moisture after packaging, an eighth sealed at the right moisture can weigh slightly less weeks later, and one packed too wet will dry in the jar. Regulated markets set tolerances for net weight; check local rules. For a home grower, an eighth is a handy unit for sample jars and for comparing cure results between batches.
Units and formula
| Slang | Nominal weight | Metric |
|---|---|---|
| Gram | 1 g | 1 g |
| Eighth | 1/8 oz | 3.5 g (exact: 3.54 g) |
| Quarter | 1/4 oz | 7 g |
| Half | 1/2 oz | 14 g |
| Ounce (zip, O) | 1 oz | 28 g (exact: 28.35 g) |
| QP | 1/4 lb (4 oz) | 113 g |
| Pound (elbow, LB) | 1 lb (16 oz) | 454 g (exact: 453.6 g) |
Retail rounds an eighth to 3.5 g and an ounce to 28 g.
Don't confuse with
- Quarter: 7 g, two eighths.
- Metric 5 g packs: some markets sell in round metric units instead.
A gram (g) is the base metric unit for weighing cannabis flower and concentrates; 28 g make a retail ounce and 3.5 g an eighth.An ounce of cannabis is 28.35 grams, rounded to 28 g in retail; slang includes zip, O and onion.A QP is a quarter pound of cannabis: 4 ounces, about 113 grams.Elbow is slang for a pound of cannabis, 16 ounces or about 454 grams, from the spoken abbreviation "L-B".
