# QP

> A QP is a quarter pound of cannabis: 4 ounces, about 113 grams.

- Canonical: https://genetixbay.com/knowledge/glossary/qp.html
- Also written: quarter pound, quarter-pound, qps, QP+, 4 oz
- Glossary category: Grower slang and culture
- Status: Draft: awaiting expert review · Updated: 2026-10-31
- Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay cannabis glossary"

A QP is a quarter pound: 4 oz, about 113 g of dried flower. It is a common unit in grower talk for a strong single-plant yield.

## In practice

"A QP off one plant" is a good result indoors. The founder of GenetixBay has pulled a QP+ (4 oz+) from a plant in a 16 oz cup, which shows that [root volume](https://genetixbay.com/knowledge/glossary/pot-size.md) is not the whole story: with [high-frequency fertigation](https://genetixbay.com/knowledge/glossary/high-frequency-fertigation.md), nutrients and water reach the roots often enough that a small container can support a large plant. Bigger pots still generally mean bigger [yields](https://genetixbay.com/knowledge/glossary/yield.md), within reason; pot size is a trade-off against how often you feed.

Possession and transport limits are usually far below a QP for unlicensed people. Check local rules.

## 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**: a quarter ounce, 7 g. "Quarter" alone usually means this, not a QP.

## Related terms

[Ounce](https://genetixbay.com/knowledge/glossary/ounce.md), [Elbow](https://genetixbay.com/knowledge/glossary/elbow.md), [Gram](https://genetixbay.com/knowledge/glossary/gram.md), [Pot size](https://genetixbay.com/knowledge/glossary/pot-size.md)

## Read more

- [Drain-to-waste drip and crop steering (generative vs vegetative dryback)](https://genetixbay.com/knowledge/systems/drain-to-waste-crop-steering.md)