MeasureCalc

Convert Acre to Hectare (ha)

Category: Area

0.404686 ha

1 acre = 0.404686 ha

Precision: 6 decimals; very small non-zero results use significant digits.

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.

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Quick conversion table

Handy values for Acre to Hectare (ha). Click a value to calculate that result.

Acre Hectare (ha)
0.404686
0.202343
1.011714
4.046856

Conversion formula

Use the following formula:

Hectare (ha) ≈ Acre × 0.40468564224

Convert area from Acre to Hectare (ha) using a fixed unit ratio. Round only the final result.

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?
1 Acre equals 0.404686 Hectare (ha).
Is Acre to Hectare (ha) conversion exact?
Many unit conversions are exact by definition, while others use standardized conversion constants.
What is the fastest way to convert Acre to Hectare (ha)?
Enter a value in Acre, choose Hectare (ha) as the target unit, and the calculator will instantly return the result.

Convert Acre to other units

Convert other units to Hectare (ha)