Centimeters to Inches Converter
Convert centimeters (cm) to inches (in). One centimeter equals 0.393701 inches, so multiply a value in centimeters by 0.393701 to get inches.
Formula: multiply the source value by 0.39370079
Quick Conversions
About this tool
A centimeter is one hundredth of a meter. The inch is exactly 2.54 centimeters. Because 1 centimeter is 0.01 meters and 1 inch is 0.0254 meters, the factor is their ratio, 0.393700787402.
How to use it
- Type a value in centimeters in the first field. The unit menus start on cm → in.
- Read the result in inches. It updates as you type; use Precision to choose how many decimals are shown.
- Press the swap button, or open the Inches to Centimeters converter, to convert inches back to centimeters.
in = cm × 0.393700787402
cm = in ÷ 0.393700787402
Examples
2.54 cm to in
2.54 cm × 0.393701 = 1 in.
30 cm to in (a school ruler)
30 cm × 0.393701 = 11.811 in.
180 cm to in (a typical adult height)
180 cm × 0.393701 = 70.8661 in.
Centimeters to inches conversion table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 | 0.393701 |
| 2 | 0.787402 |
| 3 | 1.1811 |
| 4 | 1.5748 |
| 5 | 1.9685 |
| 10 | 3.93701 |
| 15 | 5.90551 |
| 20 | 7.87402 |
| 25 | 9.84252 |
| 50 | 19.685 |
| 100 | 39.3701 |
| 250 | 98.4252 |
| 500 | 196.85 |
| 1,000 | 393.701 |
Inches to centimeters (reverse)
| Inches (in) | Centimeters (cm) |
|---|---|
| 1 | 2.54 |
| 5 | 12.7 |
| 10 | 25.4 |
| 50 | 127 |
| 100 | 254 |
FAQ
How many inches are in one centimeter?
One centimeter is 0.393701 inches. The unrounded factor is 0.393700787402.
How do I convert inches back to centimeters?
Divide by 0.393701, or multiply by 2.54. For example, 10 in is 25.4 cm.
Why is an inch exactly 2.54 cm?
Since the 1959 international yard and pound agreement, the inch has been defined as exactly 25.4 mm. That is why centimeter-to-inch conversions are exact before rounding.
Is the conversion exact?
Yes, before rounding. Both units are defined exactly in meters, so the only difference comes from how many decimals you choose to display.