Length & distance

Just how long is 3 centimetres?

Up close

3 cm

0.03 mmetres
0.098425 ftfeet
1.8641 × 10⁻⁵ mimiles
2.0054 × 10⁻¹³ AUastronomical units
True scale
01
3 centimetres3 cmLength · definition
02
UK £2 coin2.84 cmSpecified diameter · specified
Both marked spans share one linear scale. Artwork keeps its proportions; poses and surface detail are illustrative.

A little perspective

The length of 3 centimetres is about 1.06 times the specified diameter of UK £2 coin.

Measurements, assumptions & sources +

3 centimetres

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

NIST — SI conversion factors

UK £2 coin

The current bimetallic UK two-pound circulation coin is 28.4 mm in diameter, 2.5 mm thick and weighs 12 g.

Royal Mint — UK coin designs and specifications

The marked specified diameter is calibrated. Unmeasured illustration details are representative.

Measurement details

Why these numbers?

The visual compares length with specified diameter. The records below preserve each value’s basis and caveats.

3 centimetres

3 cm

Length · definition

The quantity is exact as entered. Comparisons use the clearly stated specimen, model or nominal measurement.

UK £2 coin

2.84 cm

Specified diameter · specified

The current bimetallic UK two-pound circulation coin is 28.4 mm in diameter, 2.5 mm thick and weighs 12 g.

Comparing
Length ↔ Specified diameter
Relative size
3 centimetres is larger on this measurement by a factor of about 1.06. 3 centimetres's selected measurement is approximately 5.63% greater than UK £2 coin's.

How to read the visual

The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.

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