Square centimeters to square inches
Type a value in square centimeters to see it in square inches straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the square centimeters box.
- Read the result in square inches as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
in² = cm² × 0.15500031
Multiply the value in square centimeters by 0.15500031 to get square inches.
Example
To convert 25 cm² to square inches: 25 × 0.15500031 = 3.87501 in².
Conversion table
| Square centimeters (cm²) | Square inches (in²) |
|---|---|
| 1 | 0.155 |
| 2 | 0.310001 |
| 3 | 0.465001 |
| 5 | 0.775002 |
| 10 | 1.55 |
| 20 | 3.10001 |
| 25 | 3.87501 |
| 50 | 7.75002 |
| 100 | 15.5 |
| 250 | 38.7501 |
| 500 | 77.5002 |
| 1,000 | 155 |
About the units
- Square centimeter
- A square centimeter is exactly 0.0001 square meter, the area of a square with 1 cm sides.
- Square inch
- A square inch is exactly 6.4516 square centimeters, the area of a square with 1 inch sides.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many square inches are in one square centimeter?
1 cm² = 0.155 in² exactly.
How do I convert square centimeters to square inches?
Use in² = cm² × 0.15500031. For example, 25 cm² = 3.87501 in².
How many square centimeters are in one square inch?
1 in² = 6.4516 cm².
How do I convert square meters to square feet?
Divide the square meters by 0.09290304, or multiply by about 10.7639. The factor is exact because a foot is exactly 0.3048 m.
Are the dunam, feddan and acre the same size?
No. A metric dunam is 1000 m², an Iraqi dunam 2500 m², an Egyptian feddan about 4200.83 m² and an acre 4046.8564224 m².