Length Converter
Convert metric and imperial length units — cm, m, km, inches, feet, yards and miles.
Type any number to convert lengths between metric (millimeters, centimeters, meters, kilometers) and imperial (inches, feet, yards, miles) units. Results update as you type, with full precision and a one-click swap between source and target units.
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Common length conversion formulas
These are the formulas behind the most-searched length conversions. They are exact unless marked otherwise.
| From | To | Formula | Example |
|---|---|---|---|
| Inch | Centimeter | 1 in = 2.54 cm | 10 in = 25.4 cm |
| Centimeter | Inch | 1 cm = 0.393700787 in | 50 cm ≈ 19.685 in |
| Foot | Meter | 1 ft = 0.3048 m | 6 ft = 1.8288 m |
| Meter | Foot | 1 m ≈ 3.280839895 ft | 2 m ≈ 6.5617 ft |
| Mile | Kilometer | 1 mi = 1.609344 km | 5 mi = 8.04672 km |
| Kilometer | Mile | 1 km ≈ 0.621371 mi | 10 km ≈ 6.2137 mi |
| Yard | Meter | 1 yd = 0.9144 m | 100 yd = 91.44 m |
cm to inches conversion table
Quick lookup for common centimeter values converted to inches.
| Centimeter (cm) | Inch (in) |
|---|
Why use this length converter?
A clean, fast length converter that gives the precise number you need without the noise.
- Real-time results — no “Calculate” button to press.
- One-click swap between source and target units.
- Adjustable decimal precision (up to 8 digits).
- Works on phones, tablets, and desktop browsers.
- No ads, no tracking, no sign-up.
Frequently asked questions
How accurate is the conversion?
The international yard and pound agreement defines 1 inch = 2.54 cm exactly, so the underlying ratios are exact. The displayed result is rounded only by the decimal-precision setting you pick.
What is the difference between a statute mile and a nautical mile?
A statute mile (1,609.344 m) is the everyday land mile used in the United States and the United Kingdom. A nautical mile (1,852 m) is used in air and sea navigation and is based on one minute of latitude.
How do I convert centimeters to inches by hand?
Divide the centimeter value by 2.54. For example, 30 cm ÷ 2.54 ≈ 11.811 in. To go the other way, multiply inches by 2.54.
Does my data leave the browser?
No. Every calculation runs locally on your device — no values are sent to any server.
We do not store any of your data.