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Area Converter

Land and floor space come in units that grew up separately — square feet for apartments, acres for lots, hectares for farms — and eyeballing between them rarely works. This converter links square meters, square kilometers, square feet, square yards, square miles, acres, and hectares through their exact metric equivalents.

In Square kilometers
0.000001km²
1 m² = 0.000001 km²
Value
From
To
An acre isn't a square
An acre is a fixed 43,560 square feet but has no set shape — historically one chain by one furlong. A hectare, by contrast, is exactly 100 m by 100 m, or 10,000 square meters.
Area scales as the square
Area factors are the square of length factors, so a room 10% longer and wider gains about 21% more floor space — not 10%.
All units
Square meters1
Square kilometers0.000001
Square feet10.7639
Square yards1.196
Square miles0.0000003861
Acres0.0002471
Hectares0.0001
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Uses your inputs above
0.000001 in square kilometers. Want to try a variation?

The math

Reviewed 2026
Formula
Multiply or divide by the conversion factor to a base unit.

Related calculators

Length
Volume
Weight

Example: how area is calculated

Step-by-step with default inputs

Suppose you put the default values into Area Converter:

Value
1
From
Square meters
To
Square kilometers

Plug those into the formula Multiply or divide by the conversion factor to a base unit. and the result is:

In Square kilometers
0.000001km²
Area units and their conversion factors
UnitSymbolIn square meters
Square metersm²1
Square kilometerskm²1,000,000
Square feetft²0.0929
Square yardsyd²0.8361
Square milesmi²2,589,988
Acresacre4,046.86
Hectaresha10,000

Source: NIST official conversions

How does the area converter work?

Area Converter uses the formula shown in the math card and cites NIST official conversions. Inputs are validated for sensible ranges; results are computed client-side for instant feedback and do not leave your browser.

References: NIST official conversions.

Last reviewed July 2, 2026 · Editorial policy

Frequently asked questions

How many square feet are in an acre?

43,560 square feet. An acre is about 4,046.86 square meters, and dividing by the 0.092903 square meters in a square foot gives the familiar 43,560 figure.

How big is a hectare?

10,000 square meters — a square measuring 100 meters on each side. That makes one hectare equal to about 2.47 acres.

How many acres are in a square mile?

640 acres. A square mile covers about 2.59 million square meters, or roughly 259 hectares.

How accurate is this area calculator?

The math is deterministic — the same inputs always produce the same output, and the formula is shown above. Accuracy of the answer for your situation depends on how well your inputs match reality and how well the formula models the question.

Why does Google show a slightly different conversion?

For most units the answer is identical to many decimal places. Differences usually come from currency rates (which fluctuate intraday — this tool shows the ECB's daily reference rates) or rounding. We display up to 4 decimals.

How do I share my result?

Hit Share at the top of the page. Every input you change is encoded in the URL, so a permalink reproduces exactly what you see. No account needed.