UK 10p coin
A UK 10p coin is the ten-pence denomination of the decimal pound sterling circulation coinage.
Also known as: British 10p coin, ten pence coin
How big is it?
2.45 cm · specified diameter
Also 0.965 in
Specified diameter · specified
Format: Smaller format, cupro-nickel reference. UK 10p coin: 24.5 mm (0.965 in) in diameter, 1.85 mm (0.073 in) cupro-nickel reference thickness, and 6.5 g in mass. Diameter measures across the face, not the edge thickness.
Smaller UK 10p format introduced in September 1992: 24.5 mm diameter and 6.5 g mass. The 1.85 mm thickness is used here as a cupro-nickel reference, not a verified nickel-plated steel specification. The Mint lists 1.85 mm without separating materials; secondary references report 2.05 mm for steel, so steel thickness remains unresolved here. The material change in 2012 was separate from the 1992 size reduction; cupro-nickel coins remained legal tender during the replacement programme.
Check UK 10p coin material and older-format differences. Compare UK and US coin dimensions.
A little perspective
UK 10p coin vs US quarter: diameter comparison
The diameter of a UK 10p coin is about 1.01 times the diameter of a US quarter.
A UK 10p coin is the ten-pence denomination of the decimal pound sterling circulation coinage.
A US quarter is a coin worth twenty-five cents, commonly used in United States currency.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
UK 10p coin
Specified diameter: 2.45 cm; specified.
Smaller UK 10p format introduced in September 1992: 24.5 mm diameter and 6.5 g mass. The 1.85 mm thickness is used here as a cupro-nickel reference, not a verified nickel-plated steel specification. The Mint lists 1.85 mm without separating materials; secondary references report 2.05 mm for steel, so steel thickness remains unresolved here. The material change in 2012 was separate from the 1992 size reduction; cupro-nickel coins remained legal tender during the replacement programme.
Royal Mint — 10p specifications and format history
The marked specified diameter is calibrated. Unmeasured illustration details are representative.
US quarter
Diameter: 2.426 cm; specified.
Standard copper-nickel clad US quarter: 24.26 mm diameter, 1.75 mm thickness and 5.67 g mass. Earlier silver quarters do not share this mass. The illustrated relief is representative; the circular rim is the measured span.
US Mint — circulating coin specifications
The marked diameter is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 2.45 cm
We compare the diameter of a UK 10p coin. This value follows a stated specification; check its scope in the notes.
Smaller UK 10p format introduced in September 1992: 24.5 mm diameter and 6.5 g mass. The 1.85 mm thickness is used here as a cupro-nickel reference, not a verified nickel-plated steel specification. The Mint lists 1.85 mm without separating materials; secondary references report 2.05 mm for steel, so steel thickness remains unresolved here. The material change in 2012 was separate from the 1992 size reduction; cupro-nickel coins remained legal tender during the replacement programme.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 24.5 mm (0.965 in) | Not recorded | specified - Smaller format, cupro-nickel reference | |
| 1.85 mm (0.073 in) | Not recorded | specified - Smaller format, cupro-nickel reference | |
| 6.5 g | Not recorded | specified - Smaller format, cupro-nickel reference |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueEveryday objects£1 coin2.343 cmSpecified maximum diameterA £1 coin is a twelve-sided British coin used as standard currency in the United Kingdom.
Around the same scaleEveryday objectsUK 20p coin2.14 cmSpecified maximum diameterA UK 20p coin is the seven-sided twenty-pence denomination of the decimal pound sterling circulation coinage.
Nearest higher valueEveryday objectsCherry2.5 cmDefined maximum fruit diameterA cherry is a sweet or tart fruit produced by trees of the genus Prunus, often eaten fresh or used in desserts.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- Royal Mint — 10p specifications and format historySmaller format introduced September 1992, larger format demonetised 1993: 24.5 mm diameter, 6.5 g. Lists 1.85 mm thickness without a material-specific split.
- UK 10p — material-specific and historical dimensions referenceSecondary reference: original diameter 28.5 mm; cupro-nickel thickness 1.85 mm, steel reported as 2.05 mm. The latter is not adopted as an official specification.
There’s always another scale
Follow your curiosity.
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