Convert acres to hectares

Conversion Calculator

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How to convert acres to hectares: Enter a value in the acres field and click on the "Calculate hectares" button. Your answer will appear in the hectares field.

Conversion Definitions

The following is a list of definitions relating to conversions between acres and hectares.

What is an acre (ac)?

An acre is a unit of area in both US Customary Units as well as the Imperial System. The symbol for acre is ac. There are 2.47105382 acres in a hectare.

What is a hectare (ha)?

A hectare is a unit of area in the Metric System. The symbol for hectare is ha. There are 0.404685642 hectares in an acre.

Conversion Formula

Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.

The formula to convert from acres to hectares is:

hectares = acres x 0.404685642

Conversion Example

Next, let's look at an example showing the work and calculations that are involved in converting from acres to hectares (ac to ha).

Acres to Square Centimeter Conversion Example

Task: Convert 20 acres to hectares (show work)

Formula:
acres x 0.404685642 = hectares

Calculations:
20 acres x 0.404685642 = 8.09371284 hectares

Result:
20 acres is equal to 8.09371284 hectares

Conversion Table

For quick reference purposes, below is a conversion table that you can use to convert from acres to hectares.

Acres to Hectares Conversion Chart

acres (ac)	hectares (ha)
1 acres	0.40468564 hectares
2 acres	0.80937128 hectares
3 acres	1.21405693 hectares
4 acres	1.61874257 hectares
5 acres	2.02342821 hectares
6 acres	2.42811385 hectares
7 acres	2.83279949 hectares
8 acres	3.23748514 hectares
9 acres	3.64217078 hectares
10 acres	4.04685642 hectares
20 acres	8.09371284 hectares
30 acres	12.14056926 hectares
40 acres	16.18742568 hectares
50 acres	20.2342821 hectares
75 acres	30.35142315 hectares
100 acres	40.4685642 hectares
250 acres	101.1714105 hectares
500 acres	202.342821 hectares
750 acres	303.5142315 hectares
1,000 acres	404.685642 hectares
2,500 acres	1,011.714105 hectares
5,000 acres	2,023.42821 hectares
7,500 acres	3,035.142315 hectares
10,000 acres	4,046.85642 hectares
25,000 acres	10,117.14105 hectares
50,000 acres	20,234.2821 hectares
75,000 acres	30,351.42315 hectares
100,000 acres	40,468.5642 hectares
250,000 acres	101,171.4105 hectares

Related Units

This table provides a summary of the Area units within their respective measurement systems.

Unit	Symbol	Measurement System	Description
square inches	in² or sq in	US Customary Units/Imperial System	1,296 in² = 1 yd²
square feet	ft² or sq ft	US Customary Units/Imperial System	1 ft² = 144 in²
square yards	yd² or sq yd	US Customary Units/Imperial System	1 yd² = 9 ft²
acres	ac	US Customary Units/Imperial System	1 ac = 4,840 yd²
square miles	mi² or sq mi	US Customary Units/Imperial System	1 mi² = 640 ac
square millimeters	mm²	Metric System	1 m² = 1,000,000 mm²
square centimeters	cm²	Metric System	1 m² = 10,000 cm²
square decimeters	dm²	Metric System	1 m² = 100 dm²
square meters	m²	Metric System	base unit
square decameters	dam²	Metric System	1 dam² = 100 m²
square hectometers	hm²	Metric System	1 hm² = 10,000 m²
hectares	ha	Metric System	1 ha = 10,000 m²
square kilometers	km²	Metric System	1 km² = 1,000,000 m²

Note: For area conversions, US Customary Units and the Imperial System are equivalent.

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