Square inches to Square centimeters Converter
Convert square inches to square centimeters instantly. 1 in² = 6.4516 cm². Free two-way converter with the formula and a quick reference table.
How to convert square inches to square centimeters
square centimeters = square inches × 6.4516
One square inch equals 6.4516 square centimeters, so to convert square inches to square centimeters you multiply by 6.4516. Going the other way, one square centimeter is 0.155 square inches. Both units measure area, so the conversion is an exact ratio that never changes.
10 square inches = 64.516 square centimeters. Multiply your square inch figure by the factor above (or just type it into the box) to convert any amount.
square inches to square centimeters table
| square inches (in²) | square centimeters (cm²) |
|---|---|
| 1 | 6.4516 |
| 2 | 12.9032 |
| 3 | 19.3548 |
| 5 | 32.258 |
| 10 | 64.516 |
| 20 | 129.03 |
| 25 | 161.29 |
| 50 | 322.58 |
| 100 | 645.16 |
| 250 | 1,612.9 |
| 500 | 3,225.8 |
| 1,000 | 6,451.6 |
Frequently asked questions
How many square centimeters are in a square inch?
One square inch equals 6.4516 square centimeters. So to convert, multiply the number of square inches by 6.4516.
How do I convert square inches to square centimeters?
Multiply by 6.4516, or simply enter the value in the converter above — it does the math instantly and works both ways.
Is this conversion exact?
Yes — both units measure the same quantity, so the ratio is fixed and this uses the standard internationally-agreed factor.