Centimeters to Inches Converter
Divide centimeters by 2.54 to get inches. The converter also shows longer lengths in feet and inches.
Formula
1 cm = 0.3937007874 in
inches = centimeters ÷ 2.54
Worked example
Convert 30 centimeters to inches
- Divide by 2.54
- 30 ÷ 2.54 = 11.811
30 cm = 11.811 in
Good to know
The inch has been defined as exactly 2.54 cm since 1959, so this conversion is exact — any rounding comes only from how many decimals you keep. Useful benchmarks: 30 cm is a standard school ruler (11.81 in, just under a foot), and a 15.6-inch laptop screen is about 39.6 cm across its diagonal.
Conversion table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.393701 |
| 2 | 0.787402 |
| 5 | 1.9685 |
| 10 | 3.93701 |
| 15 | 5.90551 |
| 20 | 7.87402 |
| 25 | 9.84252 |
| 30 | 11.811 |
| 40 | 15.748 |
| 50 | 19.685 |
| 60 | 23.622 |
| 75 | 29.5276 |
| 100 | 39.3701 |
| 150 | 59.0551 |
| 170 | 66.9291 |
| 180 | 70.8661 |
| 200 | 78.7402 |
About these units
- Centimeter (cm)
- One hundredth of a meter (10 mm). The everyday metric unit for body height, clothing and small objects.
- Inch (in)
- Exactly 2.54 cm since the 1959 international yard and pound agreement. There are 12 inches in a foot.