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How Much Do UK Coins Weigh? (2026 Guide)
All modern British coins are produced by the Royal Mint in Wales. Since decimalisation in 1971, £1 has been divided into 100 pence, replacing the old system of shillings and pounds.
Today, there are eight UK coins in circulation: 1p, 2p, 5p, 10p, 20p, 50p, £1, and £2 - each with a fixed weight, size, and design.
UK Coin Weights & Sizes (Quick Table)
| Coin | Weight (g) | Diameter (mm) | Thickness (mm) |
|---|---|---|---|
| 1p | 3.564 | 20.3 | 3.56 |
| 2p | 7.12 | 25.9 | 2.03 |
| 5p | 3.25 | 18.0 | 1.70 |
| 10p | 6.50 | 24.5 | 1.85 |
| 20p | 5.00 | 21.4 | 1.70 |
| 50p | 8.00 | 27.3 | 1.78 |
| £1 | 8.75 | 22.5 | 2.80 |
| £2 | 12.00 | 28.4 | 2.50 |
| £5* | 28.28 | 38.61 | 2.89 |
*£5 coins are commemorative and not typically in circulation.
Individual UK Coin Weights Explained
1p Coin Weight
The 1p coin weighs 3.564g. First introduced in 1971, it is now made from copper-plated steel rather than bronze.
2p Coin Weight
A 2p coin weighs 7.12g, exactly double a 1p. Its material changed in 1992 due to rising metal costs.
5p Coin Weight
The modern 5p coin weighs 3.25g. Earlier versions (pre-1990) were larger and heavier.
10p Coin Weight
The current 10p coin weighs 6.5g, significantly lighter than pre-1992 versions.
20p Coin Weight
The 20p coin weighs 5.0g and features a distinctive seven-sided shape.
50p Coin Weight
A modern 50p coin weighs 8.0g. Older versions (pre-1997) were much heavier.
£1 Coin Weight
The current 12-sided £1 coin weighs 8.75g, introduced in 2017 to reduce counterfeiting.
£2 Coin Weight
The heaviest circulating coin, the £2, weighs 12.0g and is bi-metallic.
£5 Coin Weight
A £5 coin weighs 28.28g, but these are commemorative coins and rarely used in everyday transactions.
FAQs About UK Coin Weights
What is the heaviest UK coin?
The £2 coin (12g) is the heaviest in circulation.
How much do 100 pennies weigh?
100 x 1p coins weigh approximately 356.4g, though slight variation can occur.
How to calculate coin value by weight
- Weigh your coins
- Divide by the weight of a single coin
- Multiply by the coin’s value
Example:
336g of 50p coins ÷ 8g = 42 coins → £21 total
Sell or Value Your Coins
Want to know what your coins are really worth? Some coins can be worth far more than face value depending on rarity and condition so get in touch with T&T Auctions today for a free valuation for Auction. Contact Us
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