Acres to Sq Ft to Hectares Converter

This calculator converts an area given in acres, square feet, or hectares into the other two units. Enter a number in any of the three fields; the other two update automatically. The result shows the equivalent area in all three common land-measurement systems.

Formula

The relationships between the three units are fixed by definition:

• 1 acre = 43,560 square feet
• 1 acre = 0.404686 hectares (exactly 0.40468564224 ha)
• 1 hectare = 10,000 square meters = 107,639.104 square feet

So the conversion formulas are:

• square feet = acres × 43,560
• hectares = acres × 0.404686
• acres = square feet ÷ 43,560
• hectares = square feet ÷ 107,639.104

Worked Example

Using the default values from the calculator: 1 acre, 43,560 sq ft, and 0.404686 ha.

1. Start with 1 acre.
2. Square feet: 1 × 43,560 = 43,560 sq ft.
3. Hectares: 1 × 0.404686 = 0.404686 ha.

The calculator shows 1 acre = 43,560 sq ft = 0.404686 ha, which matches the definitions.

Why Three Different Units?

Each unit comes from a different measurement tradition:

• Acres – used mainly in the US and UK for land and real estate. Historically defined as the area a yoke of oxen could plow in a day.
• Square feet – the standard unit for building floor area, house lots, and small parcels in the US.
• Hectares – the metric unit for land area, used in most countries for agriculture, forestry, and land registry.

Knowing all three helps when reading international documents, comparing property sizes, or working with global data.

How to Use the Calculator

Type a value into any of the three input fields. The other two fields recalculate instantly. For example:

• Enter 2 in the Acres field → Square feet becomes 87,120, Hectares becomes 0.8094.
• Enter 10,000 in the Square feet field → Acres becomes 0.2296, Hectares becomes 0.0929.
• Enter 5 in the Hectares field → Acres becomes 12.355, Square feet becomes 538,195.5.

The calculator uses the exact conversion factors, so results are accurate to the displayed decimal places.

Common Mistakes and Pitfalls

• Mixing up square feet and square meters – 1 square meter is about 10.764 sq ft, so a hectare (10,000 m²) is not 10,000 sq ft.
• Using the wrong acre – The international acre is 43,560 sq ft. The US survey acre is slightly different (43,560.0001 sq ft), but the difference is negligible for most purposes.
• Forgetting that hectares are metric – A hectare is 100 meters by 100 meters, not 100 feet by 100 feet.
• Rounding too early – If you convert acres to hectares and then to square feet, keep extra decimal places until the final step.

Real-World Examples

• A typical American suburban lot is 0.25 acres – that’s 10,890 sq ft or 0.1012 ha.
• A football field (including end zones) is about 1.32 acres – about 57,600 sq ft or 0.534 ha.
• A small farm of 10 hectares is 24.71 acres – about 1,076,391 sq ft.

These examples help you visualize the magnitudes when reading land listings.

Limitations of the Conversion

The conversion is exact for mathematical purposes, but real-world measurements may have slight errors due to surveying methods. Also, some countries use “acre” informally for different sizes (e.g., the Scottish acre is 1.27 times the international acre). For official transactions, always confirm which acre is being used.

Frequently Asked Questions

How many square feet are in an acre?

Exactly 43,560 square feet. This is the international acre definition used in the US and UK.

How many hectares in an acre?

One acre equals 0.404686 hectares. To convert acres to hectares, multiply by 0.404686.

How do I convert square feet to hectares?

Divide the number of square feet by 107,639.104 (since 1 hectare = 107,639.104 sq ft). For example, 50,000 sq ft ÷ 107,639.104 = 0.4645 hectares.

Is a hectare bigger than an acre?

Yes. A hectare is about 2.471 acres. So a hectare is roughly 2.5 times the size of an acre.

What is the difference between a hectare and a square kilometer?

A hectare is 10,000 square meters, while a square kilometer is 1,000,000 square meters. So 1 square kilometer = 100 hectares.

Why do real estate listings use acres instead of square feet?

Acres are a convenient size for land parcels – a typical house lot is a fraction of an acre, while large farms are many acres. Square feet are more useful for building floor area, but for land, acres give a more manageable number.

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in a | Acres | acres | 1 | 0
in sf | Square feet | sq ft | 43560 | 0
in ha | Hectares | ha | 0.404686 | 0
out acres | Acres | acres | a | 4
out sqft | Square feet | sq ft | sf | 0
out hectares | Hectares | ha | ha | 6