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CM to Inches Converter

Convert centimetres to inches quickly and accurately. Type a length in centimetres and the equivalent in inches appears instantly.

Your data never leaves your browser. This tool runs entirely on your device.

cm
in

Inches to CM →

Formula

To convert centimetres to inches, multiply the value by 0.3937007874.

1 cm = 0.3937 in

inches = centimetres × 0.3937007874

About centimetres and inches

The centimetre is the everyday metric unit for body measurements, paper sizes and small objects — one hundredth of a metre.

The inch is its imperial counterpart, still used for screen sizes, tyre diameters, pipe fittings and printing worldwide, even in countries that are otherwise fully metric.

Accuracy

One inch is exactly 2.54 centimetres, which makes this one of the cleanest conversions in the imperial system: to go from inches to centimetres you can simply multiply by 2.54 with no rounding error at all.

Centimetres to Inches conversion table

CentimetresInches
1 cm0.3937 in
2.54 cm1 in
5 cm1.9685 in
10 cm3.937 in
15 cm5.9055 in
20 cm7.874 in
25 cm9.8425 in
30 cm11.811 in
50 cm19.685 in
100 cm39.3701 in

Frequently asked questions

How do you convert centimetres to inches?

Inches = centimetres × 0.3937007874. For example, 1 cm equals 0.3937 in.

How many inches is 30 cm?

30 centimetres is 11.8110 inches, just under a foot.

How many inches is 100 cm?

100 centimetres — one metre — is 39.3701 inches, or 3 feet 3.4 inches.

Is 2.54 an approximation?

No. Since 1959 the inch has been defined as exactly 2.54 centimetres, so the factor is exact by definition rather than measured.

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