Square inches to Square centimetres Converter
Convert square inches (sq in) to square centimetres (cm²) instantly. Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Result
- Square centimetres
- 6.4516 cm²
How to use the square inches to square centimetres converter
- Enter the square inches (sq in).
- The results update as you type, or press Calculate.
- Read the square centimetres first, then the supporting figures below it.
Formula
Square centimetres = square inches × 6.4516
Worked example
For example, with these inputs:
- Square inches (sq in): 1
the calculator returns:
- Square centimetres: 6.4516 cm²
Square inches to Square centimetres table
| Square inches | Square centimetres |
|---|---|
| 1 sq in | 6.4516 cm² |
| 2 sq in | 12.9032 cm² |
| 5 sq in | 32.258 cm² |
| 10 sq in | 64.516 cm² |
| 20 sq in | 129.032 cm² |
| 25 sq in | 161.29 cm² |
| 50 sq in | 322.58 cm² |
| 100 sq in | 645.16 cm² |
| 250 sq in | 1,612.9 cm² |
| 500 sq in | 3,225.8 cm² |
| 1,000 sq in | 6,451.6 cm² |
About this conversion
Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many square centimetres are in one square inche?
1 sq in = 6.4516 cm².
How do I convert sq in to cm²?
Square centimetres = square inches × 6.4516.