Centimeters to Inches Converter
Convert centimeters to inches instantly. 1 cm = 0.393701 in exactly. Formula, quick table and why screen sizes still use inches.
Written by Rahman · Last reviewed
Quick answer
One centimeter equals 0.393701 inches. Divide a length in centimeters by 2.54 (or multiply by 0.393701) to get inches, so 30 cm is 11.81 inches, close to a standard US ruler.
| Metre (m) | 0.01 |
| Kilometre (km) | 0.00001 |
| Decimetre (dm) | 0.1 |
| Centimetre (cm) | 1 |
| Millimetre (mm) | 10 |
| Micrometre (µm) | 10000 |
| Nanometre (nm) | 10000000 |
| Mile (mi) | 0.000006213711922 |
| Yard (yd) | 0.01093613298 |
| Foot (ft) | 0.03280839895 |
| Inch (in) | 0.3937007874 |
| Nautical mile (nmi) | 0.000005399568035 |
| Light year (ly) | 1.057001e-18 |
cm to in conversion table
| cm | in |
|---|---|
| 1 cm | 0.3937007874 in |
| 2 cm | 0.7874015748 in |
| 3 cm | 1.181102362 in |
| 4 cm | 1.57480315 in |
| 5 cm | 1.968503937 in |
| 6 cm | 2.362204724 in |
| 7 cm | 2.755905512 in |
| 8 cm | 3.149606299 in |
| 9 cm | 3.543307087 in |
| 10 cm | 3.937007874 in |
| 20 cm | 7.874015748 in |
| 30 cm | 11.81102362 in |
| 40 cm | 15.7480315 in |
| 50 cm | 19.68503937 in |
| 60 cm | 23.62204724 in |
| 70 cm | 27.55905512 in |
| 80 cm | 31.49606299 in |
| 90 cm | 35.43307087 in |
| 100 cm | 39.37007874 in |
| 250 cm | 98.42519685 in |
| 500 cm | 196.8503937 in |
| 1000 cm | 393.7007874 in |
How to convert cm to in
Television and monitor sizes are quoted in inches even in countries that use metric for everything else: a "55-inch TV" measures 139.7 cm on the diagonal. The habit dates to when US manufacturers dominated the display industry, and it never changed even as production and sales became global.
The conversion is exact because the inch has been legally defined as precisely 2.54 centimetres since the 1959 international yard-and-pound agreement; before that, the US and UK used very slightly different inch definitions that could disagree by a few parts per million over long distances. Shoe length is marked in centimetres on the inside of the box in most of the world alongside the US and UK size, one more everyday place the two units sit side by side.
Frequently Asked Questions
How many inches is 10 cm?
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10 cm is exactly 3.937 inches, a little under 4 inches.