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Convert acres to hectares (ac to ha)

Type a value in acres or in hectares: the other field updates as you type. Below you will find the formula, a worked example and a ac to ha chart.

Updated on

1 ac = 0.404686 ha

How to convert acres to hectares

Formula: ha = ac × 0.404686

Worked example: 5 ac → 5 × 0.404686 = 2.02343 ha

Multiply acres by 0.404686 to get hectares, or divide by 2.47 for a quick estimate. A 160 acre homestead is about 64.7 hectares.

Acres to hectares conversion chart

Acres (ac)Hectares (ha)
1 ac0.404686 ha
2 ac0.809371 ha
3 ac1.21406 ha
4 ac1.61874 ha
5 ac2.02343 ha
6 ac2.42811 ha
7 ac2.8328 ha
8 ac3.23749 ha
9 ac3.64217 ha
10 ac4.04686 ha
12 ac4.85623 ha
15 ac6.07028 ha
20 ac8.09371 ha
25 ac10.1171 ha
30 ac12.1406 ha
40 ac16.1874 ha
50 ac20.2343 ha
75 ac30.3514 ha
100 ac40.4686 ha
250 ac101.171 ha
500 ac202.343 ha
1,000 ac404.686 ha

What is an acre?

The acre equals 43,560 square feet, about 4,047 m² or 0.405 hectare. It is the US and UK unit for land, lots and farms. An American football field, end zones included, covers about 1.32 acres.

What is a hectare?

The hectare equals 10,000 square meters, a square 100 m on each side. It is the international unit for farms, forests and land plots. One hectare is about 2.47 acres; a full-size soccer pitch covers about 0.7 hectare.

Frequently asked questions

How many hectares are in an acre?

An acre equals 0.404686 hectares. To convert any value, multiply the number of acres by 0.404686.

How do you convert acres to hectares?

Use the formula ha = ac × 0.404686. Example: 5 ac → 5 × 0.404686 = 2.02343 ha.

How many acres are in a hectare?

A hectare equals 2.47105 acres. That is the reverse conversion, from hectares to acres.

Results are rounded to 6 significant digits; the conversion factors are the exact legal definitions.