Acres to Hectares Converter

The acres to hectares conversion tool allows you to convert the area expressed in acres into the corresponding number of hectares and vice versa. By entering a value in one of the fields, the result will immediately appear in the other field, so it can be used from both units.

One acre is equal to 0.40468564224 hectares. Roughly speaking, one acre is about 0.4047 hectares and one hectare is about 2.4711 acres.

What is an acre?

An acre is a unit of area used in the imperial and U.S. customary measurement systems. It is defined as the area of a rectangle measuring 66 by 660 feet, which comes to 10 square chains. The most commonly used measure for land area, it is still in widespread use in much of the world today, including in countries that have mostly converted to other units of measure.

One acre is equal to 43,560 square feet and also equals 1/640 of a square mile. Therefore, there are exactly 640 acres in one square mile. The abbreviation for acre is "ac", so an acre can be written as 1 ac.

What is a hectare?

A hectare is a metric unit used to express area and can be combined with the SI system of units. The name comes from the prefix "hundred" and the area unit "are", where one hectare equals 100 are.

A hectare is equal to 10,000 square meters, which is the area of a square with sides that are 100 meters long. The abbreviation for hectare is "ha", so one hectare can be written as 1 ha. Because it's such an even metric unit, the hectare is used in most parts of the world as the standard unit for measuring land areas and making maps.

To convert acres to hectares, we do this:

To convert acres to hectares, multiply the number of acres by 0.404686. To convert from hectares to acres, divide the number of hectares by 0.404686, or multiply by approximately 2.4711.

Let's say you have a plot of land that is 5 acres. Multiply 0.404686 by 5.

Thus 5 acres is about 2.02 hectares. The following table shows the conversion results for common acreage values. This calculator also displays the corresponding values in square meters, square feet, square yards, square kilometers, square miles and ares.

How to convert hectares to acres:

You can do the conversion both ways with the same conversion factor. One acre is equal to 0.404686 hectares, so the inverse of that number will give you the number of acres in one hectare, which is approximately 2.4711 acres. If you enter the number of hectares into a calculator, it will instantly show you the corresponding number of acres, along with results for other units of area.

Regions where acres and hectares are used:

In the United States and the United Kingdom, acres are often used for many land areas of real estate, from agricultural to subdivisions and zoning. In most parts of the world, hectares is the standard metric measure and is widely used in agriculture, forestry, conservation, and map scales.

Because these two units are often mixed up in documents and data sets, being able to quickly and accurately convert between them is important. An agricultural area given in acres can be compared with yields calculated per hectare. Conservation areas measured in hectares can also be compared with properties for sale listed in acres.

Tips for accurate conversion:

In areas where accuracy is required, such as surveying or contracts, you must retain the full conversion factor of 0.40468564224 and only round at the end. For everyday estimating purposes, 0.4047 will suffice.

Please note the definition of acre used. This conversion tool uses the International Acreage. The U.S. Survey acre is about two millionths larger and this difference only becomes significant for very large areas.

This conversion tool is for general information purposes only. If used for legal purposes, surveying or transactions please check public records or consult a qualified surveyor to confirm the exact definition of area and units used.