Convert centimeters to inches instantly. Type a value below to see the result, or press Swap direction to convert inches back to centimeters. The tool uses the exact conversion factor, and a quick-reference table is below.
Inches
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Conversion formula
Inches = centimeters ÷ 2.54
1 inch is exactly 2.54 cm. To estimate in your head, multiply by 4 and divide by 10: 25 cm is about 10 inches.
Quick reference table
| Centimeters (cm) | Inches (in) |
|---|---|
| 1 cm | 0.393701 in |
| 2 cm | 0.787402 in |
| 5 cm | 1.9685 in |
| 10 cm | 3.93701 in |
| 15 cm | 5.90551 in |
| 20 cm | 7.87402 in |
| 25 cm | 9.84252 in |
| 30 cm | 11.811 in |
| 50 cm | 19.685 in |
| 100 cm | 39.3701 in |
Frequently asked questions
How do I convert centimeters to inches?
Inches = centimeters ÷ 2.54
How do I convert inches back to centimeters?
Use the reverse formula, or press Swap direction in the converter above. You can also use our reverse converter.
How many inches is 30 cm?
30 cm is about 11.81 inches.
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Conversions use standard factors. Check critical measurements.