Convert Centimetres to Inches (cm to in)

Enter a value in centimetres to convert it to inches instantly.

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Convert Centimetres to Inches (cm to in)

Centimetres (cm) are the everyday metric unit for small lengths; inches (in) are still used for height, screens and DIY. There are exactly 2.54 cm in an inch. One centimetre equals 0.3937 in, so the calculator above gives the answer the instant you type.

The formula

inches = centimetres × 0.3937. To convert the other way, divide by 0.3937 (or use the swap button above).

Worked example

To convert 30 cm to inches: 30 × 0.3937 = 11.81103 in. A 30 cm ruler is 11.81 inches — just under a foot.

Centimetres to Inches conversion table

cmin
1 cm0.3937 in
5 cm1.96851 in
10 cm3.93701 in
15 cm5.90552 in
20 cm7.87402 in
25 cm9.84253 in
30 cm11.81103 in
50 cm19.68505 in
100 cm39.3701 in
180 cm70.86618 in

Related conversions

Inches to Centimetres →Kilograms to Pounds →Miles to Kilometres →All unit conversions →

Frequently Asked Questions

1 cm = 0.3937 in.
30 × 0.3937 = 11.81103 in.
Multiply the number of centimetres by 0.3937. A 30 cm ruler is 11.81 inches — just under a foot.