Length Converter
Type a number once — see it in all 8 length units instantly.
Enter a number to see it in every unit.
All units at once
| Unit | Value |
|---|---|
| Millimeter (mm) | — |
| Centimeter (cm) | — |
| Meter (m) | — |
| Kilometer (km) | — |
| Inch (in) | — |
| Foot (ft) | — |
| Yard (yd) | — |
| Mile (mi) | — |
자주 묻는 질문
How many centimeters are in an inch?
Exactly 2.54. One inch equals 2.54 centimeters — an exact value fixed by the 1959 international yard and pound agreement, not a rounded approximation. So 10 in = 25.4 cm and 12 in (1 foot) = 30.48 cm. To convert cm to inches, divide the centimeters by 2.54.
What are the feet, yards and miles to meters conversion factors?
1 foot = 0.3048 m, 1 yard = 0.9144 m, and 1 mile = 1609.344 m (1.609344 km). These all follow from the inch: a foot is 12 inches, a yard is 3 feet, and a mile is 1760 yards. This converter uses these exact factors, so 5 miles = 8.04672 km and 100 m ≈ 328.08 ft.
How precise are the results?
Every conversion keeps up to 10 significant figures, then trailing zeros are trimmed for readability. Very large or very small numbers (roughly 1e15 and above, or below 1e-9) switch to scientific notation, so nothing is silently rounded away to zero. All values come from the exact metric definition of each unit.
Is my input sent to a server?
No. This length converter runs entirely in your browser — the number you type is never uploaded anywhere. The only thing saved is your last chosen unit pair (for example inches → centimeters), kept in your browser's local storage so it is ready next time. The value itself is not stored.
Where can I convert weight, temperature and other units?
This tool focuses on length. For other conversions — weight, temperature, area, volume, speed and data size — visit the Toolhub home, where the matching converters live alongside this one, all free and ad-light.