Square inches to Square centimetres
Convert square inches to square centimetres (in² to cm²). 1 in² = 6.4516 cm². Use the calculator, formula and conversion table.
How to convert square inches to square centimetres
Multiply the amount in square inches by 6.4516 to get square centimetres. The displayed factor and results are rounded to 12 significant digits.
cm² = in² × 6.4516Worked example
1 in² = 6.4516 cm². Change the amount in the calculator above to use your own value.
Units and assumptions
Area uses squared length factors: one square foot is exactly 0.09290304 square metres. Acres are international acres; hectares equal 10,000 square metres.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Square inches to Square centimetres table
| Square inches (in²) | Square centimetres (cm²) |
|---|---|
| 0 | 0 |
| 1 | 6.4516 |
| 5 | 32.258 |
| 10 | 64.516 |
| 25 | 161.29 |
| 100 | 645.16 |
| 1,000 | 6,451.6 |
About this conversion
What is the formula for square inches to square centimetres?
cm² = in² × 6.4516. Multiply the amount in square inches by 6.4516 to get square centimetres. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to square inches?
Use the square centimetres to square inches calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the area converter to browse all supported pairs.