Area Converters
Pick a family to convert between metric and US/imperial area units using exact international definitions.
Explanation
Area conversions in this hub use exact fixed relationships: 1 acre = 43,560 ft², 1 hectare = 10,000 m², 1 mi² = 640 acres, and 1 km² = 1,000,000 m². Because area factors are purely multiplicative with no offsets, conversions are stable and reversible. For clarity, area conversions are grouped into square-length, land-area, and cross-system categories.
Frequently Asked Questions
What is the SI unit of area?
The SI derived unit of area is the square meter (m²).
How many square feet are in an acre?
1 acre equals exactly 43,560 square feet.
What is the difference between an acre and a hectare?
An acre is a US/imperial land-area unit, while a hectare is a metric land-area unit equal to 10,000 m².
How many acres are in a square mile?
1 square mile equals 640 acres.
Are area conversions multiplicative?
Yes. Area conversions use fixed multiplicative factors with no offsets.
How do I switch direction?
Use the switch button or open the mirror family to load the reverse conversion page.