Acres to Hectares Converter

1 acre is equal to 0.404686 hectares, or 4,046.86 m².

Enter a value in the converter to get the result. This page explains the formula, works through examples and lists common values in a conversion table.

How to convert acres to hectares

Multiply the value in acres by 0.40468564224 to get hectares.

ha = × 0.40468564224
  1. 1Start with the value in acres: 1 ac.
  2. 2Apply the formula: × 0.40468564224 = 0.40468564224.
  3. 3Round to the precision you need: 0.404686 ha.

For a quick estimate without a calculator, divide by 2.5. For 1 ac that gives about 0.4 ha.

Examples

10 ac to ha × 0.40468564224
= 4.04686 ha50 ac to ha × 0.40468564224
= 20.2343 ha250 ac to ha × 0.40468564224
= 101.171 ha

Acres to Hectares conversion table

Acres (ac)Hectares (ha)Square Meters (m²)
1 ac0.404686 ha4,046.86 m²
5 ac2.02343 ha20,234.28 m²
10 ac4.04686 ha40,468.56 m²
20 ac8.09371 ha80,937.13 m²
25 ac10.1171 ha101,171.41 m²
50 ac20.2343 ha202,342.82 m²
75 ac30.3514 ha303,514.23 m²
100 ac40.4686 ha404,685.64 m²
150 ac60.7028 ha607,028.46 m²
200 ac80.9371 ha809,371.28 m²
500 ac202.343 ha2,023,428.21 m²
1,000 ac404.686 ha4,046,856.42 m²

1 acre in other units

The same value in every other unit of this category. Each row links to the full conversion.

UnitFormula1 ac equals
Acres to Square Millimetersmm² = × 4,046,856,422.44,046,856,422.4 mm²
Acres to Centimeterscm² = × 40,468,564.22440,468,564.22 cm²
Acres to Square Metersm² = × 4,046.85642244,046.86 m²
Acres to Hectaresha = × 0.404685642240.404686 ha
Acres to Square Kilometerskm² = × 0.00404685642240.00404686 km²
Acres to Square Inchesin² = × 6,272,6406,272,640 in²
Acres to Square Yardsyd² = × 4,8404,840 yd²
Acres to Square Feetft² = × 43,56043,560 ft²
Acres to Square Milesmi² = × 0.00156250.0015625 mi²

Hectares to Acres

The reverse conversion uses the inverse formula. For example, 1 ha is 2.47105 ac. Use the hectares to acres converter for other values.

ac = ÷ 0.40468564224
1 ha to ac5 ha to ac10 ha to ac25 ha to ac50 ha to ac100 ha to ac500 ha to ac1,000 ha to ac

About the units

Acre (ac)

A unit of area in the imperial and US customary systems. 1 ac = 0.404686 ha.

Hectare (ha)

A unit of area in the metric system. 1 ha = 2.47105 ac.

Accuracy and rounding

The calculation uses exact decimal arithmetic, so the conversion itself adds no error. Results are rounded to six significant figures; the formula steps show more digits.

More acres to hectares conversions

2 ac to ha5 ac to ha10 ac to ha20 ac to ha25 ac to ha50 ac to ha75 ac to ha100 ac to ha150 ac to ha200 ac to ha250 ac to ha500 ac to ha1,000 ac to ha

FAQ

How many hectares are in one acre?

One acre is equal to 0.404686 hectares.

How do I convert hectares back to acres?

Use the formula ac = ÷ 0.40468564224. See the hectares to acres converter.