How to use this area converter
Enter a numeric area, choose its current unit, and select the destination unit. The result updates immediately. Area should normally be nonnegative; a negative input remains mathematically convertible but rarely represents a physical surface.
How the calculation works
Area measures a two-dimensional surface. Length conversion factors must be squared: because one foot equals 0.3048 meter, one square foot equals 0.3048² or exactly 0.09290304 square meter.
Acres and hectares are common land-area units rather than squared versions of a base name. One hectare is exactly 10,000 square meters, while one international acre is exactly 4,046.8564224 square meters.
Formulas
General conversion
Squared length factor
Worked examples
Convert 1 acre to square feet
One international acre equals exactly 43,560 square feet.
Convert 2 hectares to square meters
2 × 10,000 = 20,000 m².
Common uses
Property and land
Translate lot, field, park, and floor areas among acres, hectares, square feet, square meters, and square kilometers while retaining the stated measurement precision.
Construction and interiors
Compare floor plans and early material estimates across square feet, square yards, and square meters. Add project allowances and waste separately.
Maps and environmental data
Convert mapped or surveyed areas between metric and customary units for communication and comparison without changing the underlying surface.
Accuracy and limitations
Factors are based on exact international definitions, including 1 foot = 0.3048 meter and 1 acre = 4,046.8564224 square meters. Display rounding does not alter the stored factor.
Unit conversion cannot correct an inaccurate boundary or measurement. Legal property, surveying, construction, and environmental decisions require authoritative records and appropriate tolerances.
Frequently asked questions
Why is an area factor squared?
Area has two length dimensions, so converting each dimension multiplies the linear factor by itself.
How many square feet are in an acre?
One international acre contains exactly 43,560 square feet.
Is a hectare metric?
Yes. A hectare is 10,000 square meters, equal to a square measuring 100 meters on each side.
Can conversion improve measurement accuracy?
No. Preserve precision internally, but round the result consistently with the source measurement.
Is the area converter free to use?
Yes. NumUtility is free, requires no account, and places no limit on ordinary calculations.
Are my entries stored?
No. The calculation runs in your browser. Values entered into the tool are not sent to NumUtility or saved by us.