Length Converter
Convert length and distance between centimetres, inches, feet, metres, yards, miles and more — with every unit in the category listed at once.
Runs in your browser
Category: Length
Result
Converted value
0.393701 inEquation
1 cm = 0.393701 in Reverse
1 in = 2.54 cm exact
All units
| Unit | Symbol | Value | Copy |
|---|---|---|---|
| Metric | |||
| Kilometre | km | 0.00001 | |
| Metre | m | 0.01 | |
| Centimetre | cm | 1 | |
| Millimetre | mm | 10 | |
| Micrometre | µm | 10,000 | |
| Nanometre | nm | 10,000,000 | |
| Imperial & UK | |||
| Inch | in | 0.393701 | |
| Foot | ft | 0.0328084 | |
| Yard | yd | 0.0109361 | |
| Mile | mi | 0.00000621371 | |
| Other | |||
| Nautical mile | nmi | 0.00000539957 | |
| Light year | ly | 1.057e-18 | |
| Astronomical unit | au | 6.68459e-14 | |
| Parsec | pc | 3.24078e-19 | |
| Ångström | Å | 100,000,000 | |
Conversion factors for every unit
One of each unit expressed in the base unit of this category (Metre).
| Unit | Symbol | In Metre |
|---|---|---|
| Kilometre | km | 1,000 |
| Metre | m | 1 |
| Centimetre | cm | 0.01 |
| Millimetre | mm | 0.001 |
| Micrometre | µm | 0.000001 |
| Nanometre | nm | 1e-9 |
| Inch | in | 0.0254 |
| Foot | ft | 0.3048 |
| Yard | yd | 0.9144 |
| Mile | mi | 1,609.344 |
| Nautical mile | nmi | 1,852 |
| Light year | ly | 9.46073047258e+15 |
| Astronomical unit | au | 149,597,870,700 |
| Parsec | pc | 3.08567758149e+16 |
| Ångström | Å | 1e-10 |
How to use
- The page opens on Length with cm → in (in → cm in the US); change From and To for any other pair.
- Type the number in Value; the result and the whole unit table update as you type.
- Use ⇄ Swap to reverse the pair, and Precision to fix the number of significant digits.
- Switch the category tabs to convert weight, area, volume or speed on the same page.
- Copy the converted value or any row of the unit table, or use Share link to send it on.
FAQ
How many centimetres are in an inch?
Exactly 2.54 cm. The inch has been defined as 0.0254 metres since the 1959 international yard and pound agreement, so inch-to-centimetre conversions are exact, not rounded.
How do I convert feet and inches to metres?
Convert the whole height to inches first (feet × 12 + inches), then multiply by 0.0254. For example 5 ft 9 in = 69 in = 1.7526 m.
What is a nautical mile?
A nautical mile is exactly 1,852 metres — roughly one minute of latitude. It is used in aviation and at sea, and it is about 15% longer than a statute mile (1,609.344 m).
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