Convert hectares to acres

Precise decimal and fraction answers

The conversion in acres rounded to six significant decimal places is 1 ha = 2.471054 acre. The precise fraction answer is 2 ⁹⁵²/₂₀₂₁ acre.

Hectares to acres conversion factor and formulas

The conversion factor between hectares and acres is 2.471. This represents the ratio of acres per one hectare. To calculate the value in acres, we can either multiply by the conversion factor or divide by its inverse.

Multiplication

To convert from hectares to acres, multiply hectares by 2.471.
The formula is expressed as:
ha × 2.471 = acre

Division

Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 2.471 is 1/2.471 or 0.405. To convert from hectares to acres, divide hectares by 0.405.
The formula is expressed as:
ha ÷ 0.405 = acre

About this conversion

Converting hectares to acres is a conversion between units from separate unit systems - hectares are metric (SI) defined units while acres are US Customary / UK Imperial .

About Hectares

The hectare is a metric measure of area defined by a square with sides 100 meters in length. One hundred hectares equal a square kilometer. The unit is widely used in the measure of large areas of land. While it is not an official SI unit, the hectare is fully compatible with the metric system and used in most countries which have adopted metric units.

Reverse this conversion

Convert from acres to hectares instead.

References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
2. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement