Acre [ac] to Hectare [ha] Converter

Quick Reference

1 Acre (ac) = 0.4046860339 Hectare (ha)

1 Hectare (ha) = 2.471051423 Acre (ac)

How to Convert Acre to Hectare

1 ac = 0.4046860338724812 ha
1 ha = 2.4710514233241505 ac

To convert Acre to Hectare, divide the value by 2.471051423 (equivalently, multiply by 0.4046860339). To convert Hectare back to Acre, multiply by 2.471051423.

Example: convert 10 ac to ha:
10 ac = 10 x 0.4046860338724812 = 4.046860338724812 ha

↔ Convert Hectare to Acre

Acre

Definition: An acre (ac) is a unit of area used in the imperial and US customary systems. It is equal to 43,560 square feet, or approximately 4,047 square meters.

History/origin: The acre has ancient origins, dating back to medieval England. It was originally defined as the area of land that a yoke of oxen could plow in a day.

Current use: Acres are commonly used in agriculture, land management, and real estate to measure larger areas of land. It's a prevalent unit in the United States and some other countries.

Hectare

Definition: A hectare (ha) is a non-SI metric unit of area equal to 10,000 square meters. It is primarily used for measuring land area.

History/origin: The hectare was adopted as a unit of area following the French Revolution, along with the metric system. It is derived from the word 'hecto,' meaning one hundred, and 'are,' which is a unit of area equal to 100 square meters.

Current use: Hectares are commonly used in agriculture, forestry, land management, and urban planning to measure large areas of land. It's a widely used unit in many countries, particularly for agricultural land.

Acre to Hectare Conversion Table

Acre [ac]	Hectare [ha]
1 ac	0.4046860338724812 ha
2 ac	0.8093720677449624 ha
5 ac	2.023430169362406 ha
10 ac	4.046860338724812 ha
20 ac	8.093720677449625 ha
50 ac	20.23430169362406 ha
100 ac	40.46860338724812 ha
200 ac	80.93720677449625 ha
500 ac	202.3430169362406 ha
1000 ac	404.6860338724812 ha

Common pairs of Area

Square Millimeter

Square Millimeter to Centimeter Square Millimeter to Square Meter Square Millimeter to Hectare Square Millimeter to Square Kilometer Square Millimeter to Square Inch

Centimeter

Centimeter to Square Millimeter Centimeter to Square Meter Centimeter to Hectare Centimeter to Square Kilometer Centimeter to Square Inch

Square Meter

Square Meter to Square Millimeter Square Meter to Centimeter Square Meter to Hectare Square Meter to Square Kilometer Square Meter to Square Inch

Hectare

Hectare to Square Millimeter Hectare to Centimeter Hectare to Square Meter Hectare to Square Kilometer Hectare to Square Inch

Square Kilometer

Square Kilometer to Square Millimeter Square Kilometer to Centimeter Square Kilometer to Square Meter Square Kilometer to Hectare Square Kilometer to Square Inch

Square Inch

Square Inch to Square Millimeter Square Inch to Centimeter Square Inch to Square Meter Square Inch to Hectare Square Inch to Square Kilometer

Square Yard

Square Yard to Square Millimeter Square Yard to Centimeter Square Yard to Square Meter Square Yard to Hectare Square Yard to Square Kilometer

Square Foot

Square Foot to Square Millimeter Square Foot to Centimeter Square Foot to Square Meter Square Foot to Hectare Square Foot to Square Kilometer

Acre

Acre to Square Millimeter Acre to Centimeter Acre to Square Meter Acre to Hectare Acre to Square Kilometer

Square Mile

Square Mile to Square Millimeter Square Mile to Centimeter Square Mile to Square Meter Square Mile to Hectare Square Mile to Square Kilometer

Acre [ac] to Hectare [ha] Converter

To convert Acre to Hectare, enter your value in the ac field above and the result in ha will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your ac value by the fixed conversion ratio to get the equivalent in ha.

Our Acre to Hectare converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select ha as your input unit and ac as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between Acre and Hectare comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the Acre to Hectare converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

Acre and Hectare are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

Acre [ac] to Hectare [ha] Converter

Quick Reference

1 Acre (ac) = 0.4046860339 Hectare (ha)

1 Hectare (ha) = 2.471051423 Acre (ac)

How to Convert Acre to Hectare

1 ac = 0.4046860338724812 ha
1 ha = 2.4710514233241505 ac

To convert Acre to Hectare, divide the value by 2.471051423 (equivalently, multiply by 0.4046860339). To convert Hectare back to Acre, multiply by 2.471051423.

Example: convert 10 ac to ha:
10 ac = 10 x 0.4046860338724812 = 4.046860338724812 ha

↔ Convert Hectare to Acre

Acre

Definition: An acre (ac) is a unit of area used in the imperial and US customary systems. It is equal to 43,560 square feet, or approximately 4,047 square meters.

History/origin: The acre has ancient origins, dating back to medieval England. It was originally defined as the area of land that a yoke of oxen could plow in a day.

Current use: Acres are commonly used in agriculture, land management, and real estate to measure larger areas of land. It's a prevalent unit in the United States and some other countries.

Hectare

Definition: A hectare (ha) is a non-SI metric unit of area equal to 10,000 square meters. It is primarily used for measuring land area.

Acre to Hectare Conversion Table

Acre [ac]	Hectare [ha]
1 ac	0.4046860338724812 ha
2 ac	0.8093720677449624 ha
5 ac	2.023430169362406 ha
10 ac	4.046860338724812 ha
20 ac	8.093720677449625 ha
50 ac	20.23430169362406 ha
100 ac	40.46860338724812 ha
200 ac	80.93720677449625 ha
500 ac	202.3430169362406 ha
1000 ac	404.6860338724812 ha