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Length converter
Length converter: convert between centimeters, meters, kilometers, inches, feet and miles online, free and without signing up. Pick the From and To units, type a value and read the result as you type. Nothing is uploaded: the maths runs in your browser.
How to convert length units online
- 1Type the number you want to convert
- 2Pick the From and To units
- 3Read the result, or look it up in the table
- The value in your unit, plus every other unit.
What happens to your numbers
- Nothing is uploaded.The sum is done by your browser. The number you type never leaves your device.
- Exact definitions.The inch, foot and mile are fixed by the meter: 2.54 cm, 0.3048 m and 1609.344 m.
- Works offline.Once the tool has been opened, it needs no connection.
What you can do
- Convert between all 6 units, with decimals and negative numbers. The result changes as you type.
- Example: 10 centimeters = 0.328084 feet.
- Press Swap to turn the conversion around without retyping the number.
- The table lists the value in every unit except the From unit, so one entry gives you 5 results.
- Go from metric to imperial and back: centimeters, meters and kilometers on one side, inches, feet and miles on the other.
Good to know
- The page opens with centimeters as the From unit, meters as the To unit and a value of 1. Change either unit at any time.
- Results show up to 10 significant digits. Very large or very small values appear in exponent form, such as 1.500000e-7.
- Feet and inches here are plain decimals: 5.5 feet is 5 feet 6 inches, not 5 feet 5 inches.
Questions
Is this length converter free?
Yes. It is free and needs no account or sign-up. Nothing you type is uploaded.
How exact is the result?
The factors are exact: 1 inch is 2.54 centimeters, 1 foot is 0.3048 meters and 1 mile is 1609.344 meters. The result shows up to 10 significant digits.
Are these US or international feet and miles?
International ones, as defined since 1959: 1 foot is 0.3048 meters and 1 mile is 5,280 feet. The older US survey foot is not used.
Which units can I convert?
Centimeters, meters, kilometers, inches, feet and miles. Pick any two of them.