Area Converter

Free area converter: convert between square meters, square kilometers, square feet, square inches, acres, hectares, square miles, and square yards instantly.

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This tool has a free JSON API. Copy a prompt or skill below to use it with ChatGPT, Claude, or any AI agent — no API key needed.

API docs
Enter a value to convert.

How area converter works

This converter handles both metric and imperial area units. It works by first converting the input to square meters (the base unit), then dividing by the target unit factor. For example, 1 acre equals 4046.86 square meters, and 1 hectare equals 10000 square meters.

The metric units (square meter, square kilometer, square centimeter, square millimeter) are related by powers of 100 or 1000000. The imperial units (square foot, square inch, square yard, square mile, acre) use exact conversion factors. Hectares are a metric unit commonly used for land area.

This is useful for real estate, agriculture, construction, and geography. Results are rounded to six decimal places, with very large or small values in scientific notation.

Frequently asked questions

How do I convert square feet to square meters?
Multiply the square feet value by 0.092903. For example, 1000 sq ft times 0.092903 = 92.903 sq m. The converter does this automatically.
How many square meters are in an acre?
One acre equals 4046.86 square meters. The converter shows this and all other units when you select acres as the source.
How many acres are in a hectare?
One hectare equals 2.47105 acres, or 10000 square meters. Hectares are commonly used in agriculture and land management outside the US.
How do I convert square kilometers to square miles?
One square kilometer equals 0.386102 square miles. The converter handles this and all other unit combinations automatically.