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Multiple conversions
To convert from Acre (ac) to Square Nanometer (nm2), use the following formula:
Square Nanometer (nm2)
= 43560 × 110.7639 × 1018× Acre (ac)
= 4.0468603387248116389× 10+21× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Micrometer (μm2), use the following formula:
Square Micrometer (μm2)
= 43560 × 110.7639 × 1012× Acre (ac)
= 4046860338724811.6389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Millimeter (mm2), use the following formula:
Square Millimeter (mm2)
= 43560 × 110.7639 × 106× Acre (ac)
= 4046860338.7248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Centimeter (cm2), use the following formula:
Square Centimeter (cm2)
= 43560 × 110.7639 × 104× Acre (ac)
= 40468603.387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Decimeter (dm2), use the following formula:
Square Decimeter (dm2)
= 43560 × 110.7639 × 100× Acre (ac)
= 404686.03387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Meter (m2), use the following formula:
Square Meter (m2)
= 43560 × 110.7639× Acre (ac)
= 4046.8603387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Are (a), use the following formula:
Are (a)
= 43560 × 110.7639 × 1100× Acre (ac)
= 40.468603387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Hectare (ha), use the following formula:
Hectare (ha)
= 43560 × 110.7639 × 1104× Acre (ac)
= 0.40468603387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Kilometer (km2), use the following formula:
Square Kilometer (km2)
= 43560 × 110.7639 × 1106× Acre (ac)
= 0.0040468603387248116389× Acre (ac)
With 110.7639 is the ratio between the base units Square Meter (m2) and Square Foot (ft2).
To convert from Acre (ac) to Square Inch (in2), use the following formula:
Square Inch (in2)
= 43560 × 144× Acre (ac)
= 6272640× Acre (ac)
To convert from Acre (ac) to Square Yard (yd2), use the following formula:
Square Yard (yd2)
= 43560 × 19× Acre (ac)
= 4840× Acre (ac)
To convert from Acre (ac) to Square Foot (ft2), use the following formula:
Square Foot (ft2)
= 43560× Acre (ac)
To convert from Acre (ac) to Square Mile (mi2), use the following formula:
Square Mile (mi2)
= 43560 × 127878400× Acre (ac)
= 0.0015625× Acre (ac)
An acre (ac) is a common unit of area used to measure land in the United States and the United Kingdom.
It is equal to exactly 43,560 square feet.
Because it can be hard to picture that size, this guide breaks down the acre's origins, dimensions, and how it compares to other units.
The acre has deep roots in agriculture. Historically, it was defined as the amount of land that one person with a single ox could plow in one day.
This practical, work-based unit was measured as an area one "furlong" long (660 feet) by one "chain" wide (66 feet).
This origin explains why the acre became a standard for land measurement long before modern units were adopted.
Many people ask about the dimensions of an acre, but because it's a measure of area, it has no required shape or specific length.
While it equals 43,560 square feet, it doesn't have to be a perfect square. An acre can be a long rectangle, an L-shape, or even a circle—as long as the total area adds up.
To help you visualize an acre, imagine a standard American football field, including the end zones. One football field is about 1.32 acres, which means a single acre would cover about three-quarters of it.
While the acre is standard in the US, most of the world uses the hectare, a metric unit of land measurement.
This difference is crucial for anyone working in international real estate, agriculture, or science.
Here's a simple acre to hectare conversion: