Centimeters to Inches Converter

1 cm = 0.393701 in  ·  1 in = 2.54 cm

Centimeters to Inches Converter

Use this free, instant Centimeters-to-Inches converter to change any value in Centimeters (cm) into Inches (in). Type a number and the result updates as you type — no signup, no ads in the way, and it works right in your browser on phone or desktop. Below you'll find the exact formula, worked examples and a quick reference table.

How to Convert Centimeters to Inches

The relationship is fixed: 1 cm = 0.3937007874 in. So to convert, you simply multiply the number of Centimeters by 0.3937007874.

Formula: value in in = value in cm × 0.3937007874

Going the other way, 1 in = 2.5400000000102 cm, so to convert Inches back to Centimeters you multiply by 2.5400000000102 (or divide by 0.3937007874).

Worked Examples

• 10 cm = 10 × 0.3937 = 3.937 in
• 30 cm = 30 × 0.3937 = 11.811 in
• 100 cm = 100 × 0.3937 = 39.3701 in

Good to Know

There are exactly 2.54 centimetres in one inch — a value fixed internationally since 1959, which is why cm-to-inch conversions are precise rather than approximate.

Frequently Asked Questions

How many in are in one cm?

There are 0.3937007874 in in one cm.

How do I convert Centimeters to Inches without a calculator?

Multiply the number of Centimeters by 0.3937007874. For a rough estimate you can round the factor, but this tool gives the exact value instantly.

Is this Centimeters to Inches converter free?

Yes — it's completely free, requires no sign-up, and runs entirely in your browser, so your numbers never leave your device.