US dime
A US dime is a ten-cent coin, the smallest denomination in US currency above the penny and nickel.
How big is it?
1.791 cm across
Also 0.705 in
Diameter · specified
Format: Standard clad. US dime: 17.91 mm (0.705 in) in diameter, 1.35 mm (0.053 in) thick, and 2.268 g in mass. Diameter measures across the face, not the edge thickness. See the dime versus UK 5p comparison.
Check US dime material and older-format differences. Compare UK and US coin dimensions.
A little perspective
US dime vs UK 5p coin: diameter comparison
The diameter of a US dime is approximately equal to the diameter of a UK 5p coin.
A US dime is a ten-cent coin, the smallest denomination in US currency above the penny and nickel.
A UK 5p coin is the five-pence denomination of the decimal pound sterling circulation coinage.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
US dime
Diameter: 1.791 cm; specified.
Standard copper-nickel clad US dime: 17.91 mm diameter, 1.35 mm thickness and 2.268 g mass. Earlier silver dimes do not share this mass.
US Mint — circulating coin specifications
The marked diameter is calibrated. Unmeasured illustration details are representative.
UK 5p coin
Specified diameter: 1.8 cm; specified.
Smaller UK 5p format introduced in June 1990: 18 mm diameter and 3.25 g mass. The 1.7 mm thickness is used here as a cupro-nickel reference, not a verified nickel-plated steel specification. The Mint lists 1.7 mm without separating materials; secondary references report 1.89 mm for steel, so steel thickness remains unresolved here. The material change in 2012 was separate from the 1990 size reduction; cupro-nickel coins remained legal tender during the replacement programme.
Royal Mint — 5p specifications and format history
The marked specified 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 1.791 cm
We compare the diameter of a US dime. This value follows a stated specification; check its scope in the notes.
Standard copper-nickel clad US dime: 17.91 mm diameter, 1.35 mm thickness and 2.268 g mass. Earlier silver dimes do not share this mass.
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 |
|---|---|---|---|
| 17.91 mm (0.705 in) | Not recorded | specified - Standard clad | |
| 2.268 g | Not recorded | specified - Standard clad | |
| 1.35 mm (0.053 in) | Not recorded | specified - Standard clad |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueEveryday objectsBlueberry1.6 cmDefined maximum fruit diameterA blueberry is an edible berry produced by shrubs of the genus Vaccinium, commonly used in food and drink.
Around the same scaleEveryday objectsUS penny1.905 cmDiameterA US penny is a copper-plated coin worth one cent in United States currency.
Nearest higher valueEveryday objectsUK 5p coin1.8 cmSpecified diameterA UK 5p coin is the five-pence denomination of the decimal pound sterling circulation coinage.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- US Mint — circulating coin specificationsNominal format specifications. Direct retrieval returned HTTP 403 during the October 2026 review; additional references identify the thickness values used.
- CoinNews — US circulating coin specificationsSecondary corroboration of nickel, dime and quarter thicknesses and format masses. Its older penny thickness differs; that value is not used.
More ways to see it
Curated comparisons
There’s always another scale
Follow your curiosity.
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