Convert between square meters, square kilometers, square feet, acres and hectares using exact area factors.
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1,000 ft² is exactly 92.90304 m², and 50 m² is about 538.19552084 ft². In land units, 1 hectare is about 2.47105381 acres and 1 km² is exactly 100 hectares.
Area factors are the squares of the length factors. A foot is 0.3048 m, so a square foot is 0.3048 × 0.3048 = 0.09290304 m². Every value passes through square meters, using the exact definitions of the acre as 4,046.8564224 m² and the hectare as 10,000 m².
Never convert an area with a length factor: multiplying square meters by 3.28 as if converting length gives a figure more than ten times too small. Traditional units are not included here; in Japan one tsubo is about 3.31 m² and a tatami mat is often treated as about 1.62 m² in property listings.
Area factors are squares of length factors. A foot is 0.3048 m, so a square foot is 0.3048 × 0.3048 = 0.09290304 m², and 1,000 ft² is exactly 92.90304 m². A common mistake is to multiply square meters by 3.28 as if converting length; 50 m² is actually about 538.19552084 ft², more than ten times the number. Always convert areas with area factors, or convert each side’s length first and then multiply.
A hectare is 10,000 m², the area of a 100 × 100 m square, and 1 km² contains exactly 100 hectares. An acre is defined as exactly 4,046.8564224 m², so 1 hectare is about 2.47105381 acres. A square mile holds 640 acres, which is about 2.58998811 km². Farms and plots are listed in hectares in most countries and in acres in the United States and the United Kingdom, so these conversions are useful when comparing land listings or maps.
Property sizes in square feet or square meters convert directly: a 50 m² apartment is about 538 ft². Some listings measure gross area including walls, others net floor area, so a conversion cannot reconcile two different measuring rules. Traditional units are not included here; in Japan one tsubo is about 3.31 m² and one tatami mat is often treated as about 1.62 m² in listings. For a room’s area from its length and width, use the Area and Square Footage Calculator.
| Input | Result |
|---|---|
1 hectare → acre | 2.47105381 |
1 acre → m² | 4,046.8564224 |
1 km² → hectare | 100 |
1000 ft² → m² | 92.90304 |
50 m² → ft² | 538.19552084 |
640 acre → km² | 2.58998811 |
Because both sides of the square are converted, not one. A square meter is 10.7639104167 square feet, since 3.28 is squared rather than applied once. That is why 50 m² comes out as about 538.19552084 ft², and why areas always need area factors.
A hectare is 10,000 m², the area of a 100 × 100 m square, and it equals about 2.47105381 acres. An acre is exactly 4,046.8564224 m². A square mile holds 640 acres, which is about 2.58998811 km². Land is listed in hectares in most countries and in acres in the United States and the United Kingdom.
Yes for the conversion itself: a 50 m² apartment is about 538 ft². But some listings measure gross area including walls while others give net floor area, and no conversion can reconcile two different measuring rules. To get a room’s area from its length and width, use the Area and Square Footage Calculator.