Area Converter

Convert area between metric and imperial units, square millimeters, centimeters, meters, kilometers, hectares, square inches, feet, yards, acres, and square miles. Calculates in your browser.

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About area conversions

Enter a value and choose the units to convert between. Each area unit is defined against a single base unit, so any pair lines up consistently, the table shows your value in every area unit at once.

What this does

An area converter changes a surface measurement from one unit to another, square millimeters, centimeters, meters, and kilometers, hectares, and imperial units like square inches, feet, yards, acres, and square miles.

How to use it

  1. Enter a value and pick its unit.
  2. Choose the unit to convert to.
  3. Read the converted result instantly.
  4. Swap the units to reverse the conversion.

How it works

Each value is converted to square meters first and then to the target unit. Area scales with the square of length: because 1 m = 100 cm, one square meter is 10,000 square centimeters.

sq ft = sq m × 10.7639

Example

One acre is 4,046.86 square meters, or about 0.405 hectares. A hectare is 10,000 square meters.

Sources & methodology

Last updated .

Frequently asked questions

How big is an acre?

One acre is 4,046.86 square meters, or about 0.4047 hectares. A hectare is 10,000 square meters.

How do square units relate to length?

Each step in length squares for area: since 1 m = 100 cm, one square meter is 10,000 square centimeters.

Is my data stored?

No. Everything is calculated locally in your browser.