Area Converter
Convert area between square meters, square kilometers, square centimeters, hectares, acres, square feet and square inches. Includes exact definitions and a land example.
Results
Result
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Educational estimates · not financial advice · free, no signup
Formula / how it works
Converts through m². 1 ft² = 0.09290304 m²; 1 in² = 0.00064516 m²; 1 acre = 4,046.8564224 m²; 1 hectare = 10,000 m²; 1 km² = 1,000,000 m².
Detailed guide
What it is, how to use it, how to read the numbers, common mistakes, a worked example, formulas, and FAQs.
What this calculator is
Area is measured in squared lengths, so converting between systems means squaring the length factor. A metre is 3.28084 feet, but a square metre is about 10.764 square feet. Land and property add more units such as acres and hectares. This converter changes a value between square metres, kilometres, centimetres, hectares, acres, square feet and square inches. Buyers comparing property listings, farmers working with hectares and acres, designers sizing rooms, and students solving problems all use area conversions. The factors are exact because the foot and inch are defined in metres.
When to use / who it helps
- You are comparing property listed in square metres with listings in square feet.
- You are converting a land size between acres and hectares.
- A material spec gives coverage in a different unit from your measurement.
- You are working on a drawing with mixed units.
- You want to check a mental conversion.
How to use
Steps
- Enter the area value.
- Choose the From unit.
- Choose the To unit.
- Read the converted value.
- Swap the units to confirm the round trip.
- Round to a precision that fits the use; real estate usually uses whole units.
How to interpret results
- One acre is 43,560 square feet and about 0.4047 hectares.
- One hectare is 10,000 square metres, about 2.471 acres.
- 1 square metre is about 10.764 square feet.
- Area conversions grow with the square of length, so small linear errors become larger area errors.
- Measurement rounding in the source can exceed the conversion's precision.
Common mistakes & gotchas
- Multiplying by the linear factor instead of its square.
- Confusing hectares with acres.
- Mixing up square metres and cubic metres.
- Reading a property's built area as the land area.
- Converting a linear measurement, such as a room's length in feet, with the area converter.
Worked example
Worked example — 5 acres in hectares, and 1 m² in ft²
- 1 acre = 4,046.8564 m², so 5 acres = 20,234.28 m².
- Divide by 10,000: 2.0234 hectares.
- For 1 m² in ft²: 1 ÷ 0.09290304 ≈ 10.7639 ft².
- Check with lengths: 1 m = 3.28084 ft, and 3.28084² ≈ 10.7639.
Result: 5 acres is about 2.02 hectares, and 1 m² is about 10.76 ft².
To load the form's own demo values, tap Try example above the Calculate button.
How to calculate / formula
Converts through m². 1 ft² = 0.09290304 m²; 1 in² = 0.00064516 m²; 1 acre = 4,046.8564224 m²; 1 hectare = 10,000 m²; 1 km² = 1,000,000 m².
Frequently asked questions
How many square feet are in an acre?
43,560.
How many acres is a hectare?
About 2.471 acres.
How do I convert m² to ft²?
Multiply by 10.7639.
Why isn't the area factor the same as the length factor?
Area squares the length, so the factor is squared too.
Is the US survey acre different?
A tiny difference exists in the old US survey definition; for most uses the international acre is fine.
What is a square kilometre in hectares?
100 hectares.