Length converter
Convert between metric, imperial, US customary, nautical, typographic and astronomical measures of distance.
Converter
Quick pairs
tap to loadOne centimeter in every length unit
37 rows| Unit | Symbol | 1 cm equals |
|---|---|---|
| Kilometer | km | 1e-5 |
| Hectometer | hm | 0.0001 |
| Dekameter | dam | 0.001 |
| Meter | m | 0.01 |
| Decimeter | dm | 0.1 |
| Millimeter | mm | 10 |
| Micrometer | µm | 10,000 |
| Nanometer | nm | 10,000,000 |
| Picometer | pm | 1e10 |
| Femtometer | fm | 1e13 |
| Angstrom | Å | 100,000,000 |
| Mile | mi | 6.213711922e-6 |
| Yard | yd | 0.01093613298 |
| Foot | ft | 0.03280839895 |
| Inch | in | 0.3937007874 |
| Nautical mile | nmi | 5.399568035e-6 |
| Fathom | ftm | 0.005468066492 |
| Rod | rd | 0.001988387815 |
| Chain | ch | 0.0004970969538 |
| Furlong | fur | 4.970969538e-5 |
| League | lea | 2.071237307e-6 |
| Mil (thou) | mil | 393.7007874 |
| Hand | hand | 0.09842519685 |
| Link | li | 0.04970969538 |
| Cubit | cubit | 0.02187226597 |
| Span | span | 0.04374453193 |
| US survey foot | ft-us | 0.03280833333 |
| Micron | µ | 10,000 |
| Point (typographic) | pt | 28.34645669 |
| Pica | pc | 2.362204724 |
| Twip | twip | 566.9291339 |
| Light year | ly | 1.057001e-18 |
| Astronomical unit | AU | 6.684587e-14 |
| Parsec | pc* | 3.240779e-19 |
| Earth equatorial radius | R⊕ | 1.567856e-9 |
| Sun radius | R☉ | 1.437401e-11 |
| Planck length | ℓP | 6.187142e32 |
How the centimeter to inch conversion works
The meter is the SI base unit; every other length here is defined as an exact multiple of it.
Multiply by 0.3937007874 to go from centimeter to inch:
in = cm × 0.3937007874
Going the other way, multiply by 2.54, which is the same as dividing by 0.3937007874.
Questions
How many inch are in one centimeter?
One centimeter equals 0.3937007874 inch.
Which units does this length converter cover?
38 units in total, all referenced to the meter. They include kilometer, hectometer, dekameter, meter, decimeter, centimeter and more. Pick any pair from the two dropdown lists.
How precise are the results?
Every conversion is computed in your browser at double precision from the factors listed on this page, which follow the SI definitions and the exact international agreements for imperial and US customary units. Use the Decimals control to round the display without changing the underlying value.
Does anything I type leave my device?
No. The converter is plain JavaScript running locally, with no server round-trip, and the page keeps working offline once loaded.