Conversion tool
Area Converter
Convert between metric and imperial area units. All factors are mathematically exact, derived from the corresponding length conversion factors.
Formula & conversion factors
1 ft² = 0.09290304 m² (exact, 0.3048²)
1 acre = 4,046.8564224 m² (exact, 43,560 ft²)
1 hectare = 10,000 m² (exact, SI-accepted)
1 mi² = 2,589,988.11 m² (exact, 1,609.344²)
Area factors are simply the square of the corresponding length factors.
1 acre = 4,046.8564224 m² (exact, 43,560 ft²)
1 hectare = 10,000 m² (exact, SI-accepted)
1 mi² = 2,589,988.11 m² (exact, 1,609.344²)
Area factors are simply the square of the corresponding length factors.
1Worked example: 1 acre in hectares. 4,046.856 m² ÷ 10,000 = 0.40469 hectares (1 hectare ≈ 2.471 acres).
Reference standard: Base unit: square metre (m²), the SI derived unit of area.
All factors derived from the International Yard and Pound Agreement (1959) length definitions.
Common questions
How many square feet are in an acre?
Exactly 43,560 square feet. An acre was historically defined as the area a yoke of oxen could plough in one day.
What is a hectare?
A hectare is 10,000 m² (100 m × 100 m). It is an SI-accepted unit commonly used for land measurement outside the US.