Square centimeters to Square inches formula
square inches = square centimeters × 0.155
Multiply the number of square centimeters by 0.155 to get square inches. To go the other way, multiply by 6.4516 instead, or use the square inches to square cm converter.
Square centimeters to Square inches conversion table
Common square cm to square inches values, rounded for reading. The converter above keeps full precision.
| Square centimeters | Square inches |
|---|---|
| 1 cm² | 0.155 in² |
| 2 cm² | 0.310001 in² |
| 3 cm² | 0.465001 in² |
| 4 cm² | 0.620001 in² |
| 5 cm² | 0.775002 in² |
| 10 cm² | 1.55 in² |
| 15 cm² | 2.325 in² |
| 20 cm² | 3.10001 in² |
| 25 cm² | 3.87501 in² |
| 50 cm² | 7.75002 in² |
| 75 cm² | 11.625 in² |
| 100 cm² | 15.5 in² |
| 250 cm² | 38.7501 in² |
| 500 cm² | 77.5002 in² |
| 1,000 cm² | 155 in² |
Worked example
To convert 10 cm² to square inches, multiply by 0.155: the result is 1.55 in². Area conversion factors are squared length factors. One acre equals exactly 4,046.8564224 square meters.
Frequently asked questions
How many square inches are in a square centimeter?
One square centimeter equals 0.155 square inches (1 cm² = 0.155 in²).
What is 10 square centimeters in square inches?
10 cm² converts to 1.55 in². Enter any other value in the converter above to see it recalculated instantly.
How do I convert square inches back to square centimeters?
Reverse the calculation: one square inch equals 6.4516 square centimeters. You can also swap the units in the converter or open the square inches to square cm page.
Related area conversions
Need a different pair? Open the full area converter to choose any two units.