Acres to Hectares Converter

Use this converter to easily convert between Acres and Hectares (ac to ha).

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How many Acres in a Hectare?

There are approximately 2.471 acres in a hectare, since an acre is defined as 4,046.8564224 m2 according to the International yard and pound agreement of 1959 while the hectare is exactly 10,000 m2 based on the International System of Units (SI). Both units are used for land area measurements. The symbol for Acre is "ac" and the symbol for Hectare is "ha".

Difference between Acres and Hectares

Both units used to measure land area thus, both are units of area. The Acre is a part of the Imperial system of units, while the Hectare is a non-SI unit accepted for use as part of the metric system of units.

Historically, the hectare was defined based on the "are", with one are equaling 100 square meters and a hect-are (hence the symbol ha) being 100 ares (10,000 m2). However, the are was dropped from the SI units system in 1959. The definition of the Hectare is now fixed to that of the meter.

The acre is an old unit which in the Middle Ages, by some accounts, amounted to the area of land that could be ploughed in a day by a yoke of oxen. Relative to other traditional measures, the acre was defined as the area of one chain by one furlong (66 ft by 660 ft), which equals 10 square chains or ​1⁄640 of a square mile. In 1959 it was defined to be exactly 4,046.8564224 square meters. The acre saw wide use in the United Kingdom and almost all countries of the former British Empire but is now only informally used in some of those countries. The acre is currently a statute measure for tracts of land only in the United States.

How to convert Acres to Hectares

To convert ac to he, divide the measurement in acres by 2.471 to get the area in hectares. Using a calculator is usually helpful when accuracy is desired, and our free online acres to hectares converter is of great help.

Acres to Hectares conversion example

Sample task: convert 60 ac to ha. Solution:

Formula:
ac / 2.4710538149159 = ha
Calculation:
60 ac / 2.4711 = 24.281139 ha
End result:
60 ac is equal to 24.281139 ha

Acres to Hectares conversion table

ac to ha conversion table
ac ha
1 ac 0.404686 ha
2 ac 0.809371 ha
3 ac 1.214057 ha
4 ac 1.618743 ha
5 ac 2.023428 ha
6 ac 2.428114 ha
7 ac 2.832799 ha
8 ac 3.237485 ha
9 ac 3.642171 ha
10 ac 4.046856 ha
20 ac 8.093713 ha
30 ac 12.140569 ha
40 ac 16.187426 ha
50 ac 20.234282 ha
60 ac 24.281139 ha
70 ac 28.327995 ha
80 ac 32.374851 ha
90 ac 36.421708 ha
100 ac 40.468564 ha
200 ac 80.937128 ha
300 ac 121.405693 ha
400 ac 161.874257 ha
500 ac 202.342821 ha
600 ac 242.811385 ha
700 ac 283.279950 ha
800 ac 323.748514 ha
900 ac 364.217078 ha
1,000 ac 404.685642 ha

References:

[1] NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

[2] International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Acres to Hectares Converter", [online] Available at: https://www.gigacalculator.com/converters/convert-acres-to-hectares.php URL [Accessed Date: 21 Jul, 2019].