How Many Grams Is a QP?
A QP is a quarter pound, which is 113.4 grams — 113.398 g precisely, and exactly four ounces. These are imperial weights carried into everyday cannabis vocabulary, which is why the metric equivalents look so untidy.
Full conversion chart
| Term | Also called | Grams | Ounces |
|---|---|---|---|
| Gram | "a G", dime | 1 g | 0.035 oz |
| Eighth | 1/8 ounce, "eef" | 3.5 g | 0.125 oz |
| Quarter | 1/4 ounce, "quad" | 7 g | 0.25 oz |
| Half | 1/2 ounce, "half O" | 14 g | 0.5 oz |
| Ounce | zip, "O" | 28.35 g | 1 oz |
| QP | quarter pound | 113.4 g | 4 oz |
| HP | half pound, "half pack" | 226.8 g | 8 oz |
| Pound | "elbow", "P" | 453.6 g | 16 oz |
Quick answers
- How many grams in a QP? 113.4 g.
- How many ounces in a QP? Four.
- How many zips in a pound? Sixteen — a zip is an ounce.
- How many zips in a QP? Four.
- How many eighths in an ounce? Eight.
- How many eighths in a QP? Thirty-two.
- How many grams in a zip? 28.35 g, almost always rounded to 28.
- How many grams in a half pound? 226.8 g.
Why "zip" means an ounce
The usual explanation is that an ounce filled a standard zip-lock bag. As with most slang the origin is not formally documented, so treat that as folk etymology rather than settled fact. The usage itself is unambiguous: a zip is an ounce.
Why imperial units at all?
The United States never converted to metric for everyday commerce, and cannabis vocabulary formed in an unregulated market that used the units people already had. Ounces and pounds came first; grams arrived later through the influence of international trade and, more recently, through regulated markets that mandate metric labelling.
The result is a vocabulary that mixes both systems in a single sentence — buying "an eighth" and being handed something labelled 3.5 g is entirely normal. Legal dispensary packaging is generally metric because regulators require it, while informal conversation stays imperial. Neither is going away, so it is worth being fluent in both.
The rounding trap
An ounce is 28.35 g but is nearly always sold as 28 g. That 0.35 g gap compounds as quantities rise:
- A "28 g" ounce is 0.35 g under a true ounce.
- A QP quoted as 112 g is 1.4 g under a true quarter pound.
- A pound quoted as 448 g is 5.6 g under 453.6 g.
Neither convention is dishonest provided both parties use the same one. It is worth knowing which is in play before comparing prices.
Working out price per gram
Comparing a QP price with an eighth price only makes sense per gram. Divide the total by the true gram weight rather than the rounded one, and compare like with like. A larger quantity at a lower unit price is only better value if the material is equivalent — which brings us to the part the charts leave out.
A worked example, using a single hypothetical price point so the arithmetic is visible:
| Quantity | True grams | Example total | Per gram |
|---|---|---|---|
| Eighth | 3.5 | $40 | $11.43 |
| Quarter | 7 | $70 | $10.00 |
| Ounce (zip) | 28.35 | $220 | $7.76 |
| QP | 113.4 | $700 | $6.17 |
Those totals are illustrative, not quoted prices — real figures vary widely by state, product and season. The pattern is the point: unit price falls as quantity rises, which is exactly why the rounding convention and the actual potency both matter before committing to volume.
Weight is not potency
Two QPs of identical weight can differ substantially in cannabinoid content. Mass tells you how much plant material you have; it says nothing about concentration. What determines effect is the measured cannabinoid content, and the only reliable source for that is a laboratory report tied to the batch.
When comparing, read the certificate of analysis for total cannabinoid percentages, the batch number and the testing laboratory. Across our catalogue as of September 2026 we publish 4,395 cannabinoid readings from 312 tested batches analysed by 39 laboratories. You can look up any batch or browse flower with lab data.
Storage at volume
Larger quantities take longer to get through, which makes degradation a practical concern. Cannabinoids break down with exposure to heat, light and oxygen, and THC converts slowly to CBN over time. Airtight containers kept cool and dark slow that considerably. Humidity control matters too — too dry and the material becomes harsh, too damp and you risk mould.
Possession limits
Quantity thresholds carry legal weight in most jurisdictions, and hemp-derived product rules differ from state cannabis rules and are changing quickly. Check your own state's current position before buying at volume.
Frequently asked questions
How many grams is a QP?
113.4 grams, which is four ounces or a quarter of a pound.
How many zips are in a QP?
Four. A zip is one ounce, and a QP is four ounces.
Is a QP the same as 4 ounces?
Yes. A quarter of a sixteen-ounce pound is four ounces.
Why is an ounce 28 grams and not 28.35?
It is rounded for convenience. The true figure is 28.35 g, and the difference compounds — a pound sold as 448 g is 5.6 g under a true pound.
Does a heavier quantity mean stronger product?
No. Weight and potency are independent. Cannabinoid concentration is measured by a laboratory and reported on the certificate of analysis for that batch.
Browse lab-tested products
- Vape cartridges and disposables
- Gummies and edibles
- THCA flower
- THC drinks and seltzers
- Oils and tinctures
- Product finder · Hemp and drug testing · Batch lookup
Chow420 lists products from independent sellers. Nothing here is medical advice, and cannabinoid figures describe the specific batch a laboratory tested rather than every unit ever made. Always read the certificate of analysis on the listing you are buying. Products containing THC are for adults only.
Shop What You Just Read About
Every product is COA-verified and blockchain-anchored on Chow420.
