Acre, unit of land measurement in the British Imperial and United States Customary systems, equal to 43,560 square feet, or 160 square rods.The word acre was originally derived from aker, a Middle English word.The most common use of the acre is to measure tracts of land.Originally, in the middle Ages, this unit was used to represent the area of land that could be ploughed in one day by a yoke of oxen.One acre is equivalent to 0.4047 hectares (4,047 square meter).
Standard Units | |
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Hectares (ha) | {{ha}} |
Square Centimeters (cm²) | {{cm}} |
Square Feet (ft²) | {{ft}} |
Square Inches (in²) | {{inch}} |
Square Kilometers (km²) | {{km}} |
Square Meters (m²) | {{m}} |
Square Microinches (µin²) | {{microinch}} |
Square Micrometers (sq µm) | {{sqmicrometer}} |
Square Microns (µ²) | {{microns}} |
Square Miles (mi²) | {{mi}} |
Square Millimeters (mm²) | {{mm}} |
Square Yards (yd²) | {{yd}} |
The acre is a unit of land area used in the imperial and US customary systems. The international symbol of the acre is ac. One international acre is defined as exactly 4,046.856 square meters.