Area Converter

Area Unit Converter

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Full Reference Table

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Area Units Explained

Area measurement is critical for real estate, agriculture, construction, urban planning, and geographic mapping. Our free online area converter supports nine widely used units from square centimeters to square miles, generating a complete reference table with every conversion.

Metric Area Units

The square meter (m²) is the SI base unit of area. It is used worldwide for room sizes, building floor plans, and small plots of land. Larger areas use square kilometers (km²) for countries and regions, while the hectare (ha = 10,000 m²) is the standard unit for agricultural land internationally.

A square centimeter (cm²) is useful for small surfaces like paper, screens, and technical drawings.

Imperial and US Area Units

In the United States and United Kingdom, land area is typically measured in acres and square miles. One acre equals 43,560 square feet or approximately 4,047 square meters. One square mile equals 640 acres or about 2.59 km².

Square feet are used for indoor spaces — rooms, apartments, and offices — while square yards appear in carpet and textile measurements.

Agriculture and Land Area

Farmers and land registries worldwide use a mix of metric and imperial units depending on the country. In the UK and USA, farms are measured in acres; in continental Europe and most of Asia, hectares are the norm. Our converter makes cross-border land valuation and comparison straightforward.

Key Conversion Facts

  • 1 hectare = 2.471 acres = 10,000 m²
  • 1 acre = 4,047 m² = 43,560 ft²
  • 1 km² = 100 hectares = 247.1 acres
  • 1 square mile = 640 acres = 2.59 km²
  • 1 square foot = 929.03 cm² = 0.0929 m²

Frequently Asked Questions

How many square feet are in an acre?
One acre equals exactly 43,560 square feet. It also equals 4,840 square yards or 4,046.856 square meters. The acre is the standard unit for land measurement in the US, UK, and several other countries.
What is the difference between a hectare and an acre?
A hectare (10,000 m²) is larger than an acre (4,047 m²). One hectare equals approximately 2.471 acres. Hectares are used in metric countries and internationally in agriculture and mapping; acres are used in the US and UK.
How big is a square mile?
One square mile equals 640 acres, 2.59 square kilometers, or 27,878,400 square feet. It is commonly used for the area of cities, counties, and geographic regions in the United States.
How many square meters in a square foot?
One square foot equals exactly 0.09290304 square meters. Conversely, one square meter equals approximately 10.7639 square feet. This conversion is essential for comparing apartment sizes listed in different countries.
How is area different from length or volume?
Length measures one dimension (distance), area measures two dimensions (surface), and volume measures three dimensions (space). When converting area units, note that conversion factors are the square of the corresponding length factors — for example, 1 m = 100 cm, so 1 m² = 10,000 cm².