How to Convert Square centimetres to Square metres (cm² to m²)
Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet. This guide shows how to convert square centimetres into square metres by hand, with examples and a quick-reference table.
The conversion
To convert square centimetres to square metres, multiply the value by 0.0001. To go the other way, divide by the same number (or multiply by 10,000). Because the factor is tiny, scientific notation keeps the numbers manageable.
Square metres = square centimetres × 0.0001
Worked examples
- 3 cm² = 0.0003 m²
- 12.5 cm² = 0.00125 m²
- 75 cm² = 0.0075 m²
Square centimetres to Square metres table
| Square centimetres | Square metres |
|---|---|
| 1 cm² | 0.0001 m² |
| 2 cm² | 0.0002 m² |
| 5 cm² | 0.0005 m² |
| 10 cm² | 0.001 m² |
| 20 cm² | 0.002 m² |
| 25 cm² | 0.0025 m² |
| 50 cm² | 0.005 m² |
| 100 cm² | 0.01 m² |
| 250 cm² | 0.025 m² |
| 500 cm² | 0.05 m² |
| 1,000 cm² | 0.1 m² |
Common questions
Is cm² to m² exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Square metres to Square centimetres converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Background
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.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Square centimetres to Square metres Converter or browse all area converters.
Run your own numbers: Square centimetres to Square metres Converter