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US quarter vs £1 coin: diameter comparison

The diameter of a US quarter is about 1.04 times the maximum diameter of a £1 coin.

US quarter
Diameter
£1 coin
Specified maximum diameter
Scale
US quarter
2.426 cmDiameter
0 - shared origin
£1 coin
2.343 cmSpecified maximum diameter
0 - shared origin

Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.

In perspective1.04 times
Measurements, assumptions & sources

US quarter

2.426 cm - Diameter; specified.

A US quarter is a coin worth twenty-five cents, commonly used in United States currency.

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

£1 coin

2.343 cm - Specified maximum diameter; specified.

A £1 coin is a twelve-sided British coin used as standard currency in the United Kingdom.

Twelve-sided bimetallic UK pound introduced on 28 March 2017: 23.43 mm maximum point-to-point span, 2.80 mm published thickness and 8.75 g mass. The older round pound was 22.5 mm across, 3.15 mm thick and 9.50 g; its legal tender status ended on 15 October 2017. Specimen rim measurements are not official thickness tolerances.

Royal Mint — £1 coin specifications

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US quarter vs £1 coin