Length Converter

Convert any length or distance between metric units (mm, cm, m, km), imperial and US units (inches, feet, yards, miles) and nautical miles — in both directions as you type.

Runs in your browser

From

Unit

1 cm = 0.3937007874 in

Factor: 1 cm = 0.393700787402 in

Conversion table: Centimetre (cm) → Inch (in)
cm	in
1 cm	0.393701 in
2 cm	0.787402 in
5 cm	1.9685 in
10 cm	3.93701 in
20 cm	7.87402 in
30 cm	11.811 in
50 cm	19.685 in
100 cm	39.3701 in
150 cm	59.0551 in
180 cm	70.8661 in
200 cm	78.7402 in

How to use

Enter a value on either side.
Choose the units to convert from and to.
Read the result, or swap the units with the arrow button.

How it works

Every unit is converted through the metre. The international inch is defined as exactly 25.4 mm (since 1959), so a foot is exactly 0.3048 m, a yard 0.9144 m and a statute mile 1,609.344 m. A nautical mile is exactly 1,852 m.

Examples

Height: 1.80 m = 5.906 ft (5 ft 10.9 in).
TV size: 55 in = 139.7 cm diagonal.

Common uses

DIY and furniture measurements
Travel distances
Sports and running distances

Privacy & security

This tool runs entirely in your browser. Your files and text are never uploaded to our servers — processing happens on your device and results are created locally. How each tool handles files

Frequently asked questions

How many centimetres in an inch?

Exactly 2.54 cm.

Is a US mile the same as a UK mile?

Yes, both use the international mile of 1,609.344 m.

Last updated: September 18, 2026