UK Weed Weights Explained: Grams, Eighths (Henry), Quarters & Ounces
Complete UK weed measurements guide. Master metric-to-imperial weights from a 1g draw to 3.5g Henry, 7g quarter, and 28g ounce with price charts and scale tips.
The British cannabis scene uses a unique hybrid of imperial and metric measurements. Whether you hear UK slang like a "draw", "Henry", "Q", or "Zip", understanding exact gram weights ensures you always receive what you pay for. Here is our definitive conversion guide for UK weed weights and pricing.
What Are the Standard UK Cannabis Measurements and Slang Terms?
Direct Answer: UK cannabis is measured using standard gram increments derived from the imperial ounce (28.3495 grams). An eighth (3.5g) is known as a "Henry", a quarter (7g) as a "Q", a half-ounce (14g) as a "Half", and a full ounce (28g) as a "Zip" or "O".
| UK Measurement | Metric Weight | Common UK Slang | Typical Joint Yield |
|---|---|---|---|
| Single Gram | 1.0 Gram | Draw, Ten Bag, Gram | 1 – 2 Joints |
| One-Eighth Ounce | 3.5 Grams | Henry (Henry VIII), Eighth, Slice | 5 – 7 Joints |
| Quarter Ounce | 7.0 Grams | Q, Quarter | 10 – 14 Joints |
| Half Ounce | 14.0 Grams | Half, Halfer | 20 – 28 Joints |
| Full Ounce | 28.0 Grams | Zip, O, Oz, Lid | 40 – 60 Joints |
Why Do Two Bags of 3.5g Look Completely Different in Size?
Direct Answer: The physical volume of a 3.5g eighth varies depending on bud density, calyx structure, and genetics. Tight, dense indica buds (like Biscotti) look smaller but weigh heavy, while airy, foxtailing sativa flowers take up significantly more visual space at the exact same 3.5g weight.
Density vs Fluff: What to Look For
Do not judge weight by visual eye test alone. A small nugget of rock-hard, resin-dense flower can easily weigh 1.5g on its own, whereas three large, fluffy sativa nugs might only register 1.0g on a digital scale.
How to Accurately Weigh Your Weed at Home
Always verify your dispensary deliveries using a digital pocket jewel scale with 0.01g precision. Do not use kitchen scales, which often fail to register weights under 5g accurately.
The British Coin Calibration Test
If you ever suspect your digital scale is out of calibration, use standard Royal Mail circulation coins to check accuracy:
- A standard modern British 1p coin weighs exactly 3.56 grams (very close to an eighth).
- A standard British 2p coin weighs exactly 7.12 grams (virtually identical to a quarter ounce).
If your scale reads your 2p coin as 7.12g, you know with absolute mathematical certainty that your dispensary orders are accurate to the decimal. Explore our full UK cannabis menu for verified 3.5g, 7g, 14g, and 28g packages.
Specialising in phytocannabinoid chemistry, terpene stability, and pharmaceutical extraction protocols. Callum conducts laboratory quality control and cannabinoid profile auditing across the weed-market catalog.