Square Inches to Square Centimetres
Convert square inches (in²) to square centimetres (cm²) instantly — with formula and reference table.
in²
cm²
Quick answer: 1 in² = 6.4516 cm². To convert square inches to square centimetres, multiply by in² × 6.4516.
Converting square inches to square centimetres
This converter changes a value in square inches (in²) into square centimetres (cm²). One square inche equals 6.4516 cm². One square inch equals exactly 6.4516 square centimetres. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
cm² = in² × 6.4516
Example
Convert 10 in² to cm²: 10 × 6.4516 = 64.516 cm².
Square Inches to Square Centimetres conversion table
| Square Inches (in²) | Square Centimetres (cm²) |
|---|---|
| 1 in² | 6.4516 cm² |
| 2 in² | 12.9032 cm² |
| 3 in² | 19.3548 cm² |
| 5 in² | 32.258 cm² |
| 10 in² | 64.516 cm² |
| 20 in² | 129.032 cm² |
| 25 in² | 161.29 cm² |
| 50 in² | 322.58 cm² |
| 100 in² | 645.16 cm² |
How to use this converter
- Enter a value in the square inches (in²) field.
- Read the converted value in square centimetres (cm²) below.
- Type into the cm² field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many square centimetres are in a square inch?
1 square inch equals 6.4516 square centimetres.
How do I convert 10 sq in to sq cm?
10 times 6.4516 = 64.5 square centimetres.
Why is the factor 6.4516?
It is 2.54 squared, since one inch is 2.54 cm.