Centimetres to Inches Converter

Convert between centimetres and inches instantly. Enter a value, pick a direction, and get the exact converted length.

Result
3.937
Conversion
10 cm = 3.937 in

How it works

One inch is defined as exactly 2.54 centimetres, so converting is a single multiplication or division by that fixed factor.

Formula
Inches = cm / 2.54 | cm = inches x 2.54

Example. 10 cm converts to about 3.937 inches. 6 inches converts to 15.24 cm.

Frequently asked questions

Why exactly 2.54?

An international agreement in 1959 fixed the inch at exactly 2.54 cm, replacing several slightly different national definitions that existed before then. It's an exact conversion, not a rounded approximation.

How many inches is 1 cm?

1 cm is exactly 0.393701 inches (1 / 2.54).

How many cm is 1 inch?

Exactly 2.54 cm.

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