Centimeters to Inches Converter
1 cm equals 0.39370079 in, and 1 in equals 2.54 cm. Enter a value in either box to convert centimeters to inches and back. Formula: meters of depth = value x unit factor (1 in = 25.4 mm exactly; 1 mm of rain = 1 L per m2).
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1 cm = 0.39370079 in
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Centimeters to Inches Conversion Table
| Centimeters | Inches |
|---|---|
| 1 cm | 0.39370079 in |
| 2 cm | 0.78740157 in |
| 5 cm | 1.9685039 in |
| 10 cm | 3.9370079 in |
| 25.4 cm | 10 in |
| 50 cm | 19.685039 in |
| 100 cm | 39.370079 in |
| 250 cm | 98.425197 in |
| 500 cm | 196.85039 in |
Inches to Centimeters Conversion Table
| Inches | Centimeters |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 5 in | 12.7 cm |
| 10 in | 25.4 cm |
| 25.4 in | 64.516 cm |
| 50 in | 127 cm |
| 100 in | 254 cm |
| 250 in | 635 cm |
| 500 in | 1,270 cm |
Worked example: 10 cm = 3.9370079 in. 50 mm of rain is 50 / 25.4 = 1.97 inches. On a 40 m2 roof that is 40 x 50 = 2,000 liters of water.
Need other units? Open the full Rainfall Converter.
Popular Rainfall Conversions
Formula
meters of depth = value x unit factor (1 in = 25.4 mm exactly; 1 mm of rain = 1 L per m2)Understanding Rainfall Conversion
Rainfall is reported as the depth of water that would collect on flat ground. Meteorological services outside the US use millimeters, while US reports use inches. One millimeter of rain is the same as one liter of water spread over one square meter, which is why the two units give identical numbers. One inch of rain is exactly 25.4 millimeters.
Tips and Best Practices
- 1Divide millimeters by 25.4 to get inches.
- 21 mm of rain on 1 m2 is 1 liter.
- 3A roof area in square meters times millimeters of rain gives liters collected.
Real-World Example
50 mm of rain is 50 / 25.4 = 1.97 inches. On a 40 m2 roof that is 40 x 50 = 2,000 liters of water.
Common Mistakes to Avoid
- Assuming 1 inch of snow equals 1 inch of rain; snow is usually ten times as deep as its water equivalent.
- Forgetting that rainfall depth does not depend on area but total volume does.
- Mixing monthly totals with single-event totals.
How to Use
- Type a number in the Centimeters box.
- The Inches result appears instantly; you can also edit the Inches box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many inches are in 1 cm?
How many centimeters are in 1 in?
What is the formula to convert centimeters to inches?
How many liters is 1 mm of rain?
Sources: NIST SP 811 (international inch = 25.4 mm); definition of the liter (1 L = 1 dm3).