Area converter
Convert any area via the SI square metre. Exact BIPM / NIST factors — see the arithmetic for your input, plus a table of every equivalent.
Defaults to your region. Switch to compare any other scale.
Canonical unit is the square metre. Imperial areas use exact squared international inch factors; 1 acre = 4046.8564224 m².
Result
9.290304 m²
ft² → m²
100 ft² × 0.09290304 = 9.290304 m²; 9.290304 ÷ 1 = 9.290304 m²
- In SI square metres9.290304 m²
- Factor (from)1 ft² = 0.09290304 m²
- Factor (to)1 m² = 1 m²
- How calculated100 ft² × 0.09290304 = 9.290304 m²; 9.290304 ÷ 1 = 9.290304 m²
- Cross rate1 ft² = 0.09290304 m²
Via the square metre (SI)
Standards: BIPM SI + international acre (exact 4046.8564224 m²). 100 ft² × 0.09290304 = 9.290304 m²; 9.290304 ÷ 1 = 9.290304 m²
All equivalents
| Unit | Symbol | Value | Factor to m² |
|---|---|---|---|
| mm² (square millimetre) | mm² | 9,290,304 | 1 mm² = 0.000001 m² |
| cm² (square centimetre) | cm² | 92,903.04 | 1 cm² = 0.0001 m² |
| dm² (square decimetre) | dm² | 929.0304 | 1 dm² = 0.01 m² |
| m² (square metre) | m² | 9.290304 | 1 m² = 1 m² |
| a (are) | a | 0.09290304 | 1 a = 100 m² |
| ha (hectare) | ha | 0.0009290304 | 1 ha = 10000 m² |
| km² (square kilometre) | km² | 0.000009290304 | 1 km² = 1000000 m² |
| in² (square inch) | in² | 14,400 | 1 in² = 0.00064516 m² |
| ft² (square foot) | ft² | 100 | 1 ft² = 0.09290304 m² |
| yd² (square yard) | yd² | 11.111111 | 1 yd² = 0.83612736 m² |
| ac (acre) | ac | 0.00229568 | 1 ac = 4046.8564224 m² |
| mi² (square mile) | mi² | 0.000003587006 | 1 mi² = 2589988.110336 m² |
About this tool
Area conversion is a two-step scale change through the square metre. Multiply the input by its factor to m², then divide by the target factor: value_m2 = value × factor_from; result = value_m2 ÷ factor_to.
Metric prefixes (mm², cm², dm², km²) are exact powers of ten of the square metre. One are (a) is exactly 100 m²; one hectare (ha) is exactly 10 000 m². Imperial units use the international inch: 1 in² = (0.0254)² m², 1 ft² = (0.3048)² m², 1 yd² = (0.9144)² m², and 1 mi² = (1609.344)² m². The international acre is exactly 43 560 ft² = 4046.8564224 m².
Use the all-units table for real estate, farming, DIY flooring, or school homework. Pair with the length converter when you need side lengths as well as floor area.
Formula
value_m2 = value × factor_fromresult = value_m2 ÷ factor_to1 ft² = 0.09290304 m² (exact = (0.3048)²)1 ac = 4046.8564224 m² (exact = 43560 ft²)1 ha = 10000 m² · 1 a = 100 m² · 1 km² = 1e6 m²
How it is calculated
- Enter an area and pick From / To units.
- Convert to square metres: value_m2 = value × factor_from (e.g. 1 ft² = 0.09290304 m²).
- Convert to the target: result = value_m2 ÷ factor_to.
- Read the step rows for the exact arithmetic of this input.
- Open the equivalents table to see mm², cm², m², ft², ha, ac, mi² and more at once.
Questions
How does area conversion work?
All areas go through the square metre: multiply by the source factor to get m², then divide by the target factor. Example: 100 ft² → 100 × 0.09290304 = 9.290304 m².
How many square metres in an acre?
The international acre is exactly 43 560 square feet = 4046.8564224 m² (NIST / BIPM path via the international foot).
What is a hectare vs an are?
One are (a) is exactly 100 m². One hectare (ha) is exactly 100 ares = 10 000 m² = 0.01 km². Both are SI-accepted land-area units.
Are the results official metrology advice?
No. Calculate This is educational. For legal metrology (cadastre, surveying), use your national institute’s guidance and calibrated instruments.