Convert Acre to Hectare (ha)
Category: Area
1 acre = 0.404686 ha
High-precision rounding: 6 decimals
How to convert acre to hectare (ha)
Area equals length squared. It appears in real estate, land management, material takeoffs, and GIS. Square meters are SI standard; acres and hectares are common for land reporting in different regions.
This converter calculates Acre to Hectare (ha) values by using the correct conversion rule for the Area category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.
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Quick conversion table
Handy values for Acre to Hectare (ha). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Squaring a length conversion factor incorrectly or forgetting to square it.
Unit facts
- Acre: An acre is exactly 4,046.8564224 m²; traditional land measure in the Anglosphere.
- Hectare (ha): A hectare (ha) is 10,000 m² (100 m × 100 m); common in agriculture and land planning.
About Acre
Acre
Exactly 4,046.8564224 m². Traditional land area in US/UK real estate and agriculture.
History: Medieval origins as the area ploughable in a day; later standardized to a fixed metric value.
About Hectare (ha)
Hectare (ha)
Equals 10,000 m² (100 m × 100 m). Convenient for land, forestry, and GIS datasets.
History: Adopted with the metric system to provide a practical large-area unit aligned to decimal meters.
Frequently asked questions
How many Hectare (ha) are in one Acre?
Is Acre to Hectare (ha) conversion exact?
What is the fastest way to convert Acre to Hectare (ha)?
Convert Acre to other units
- acre → ft2 Square foot (ft²)
- acre → km2 Square kilometer (km²)
- acre → m2 Square meter (m²)
- acre → yd2 Square yard (yd²)