Home/Area/Hectares to Acres

Area converter

Hectares to Acres

If you need to know how many Acres one Hectares contains, the answer is 2.471054. The conversion is linear, so 10 ha is 24.710538 ac and 100 ha is 247.105381 ac. Use the converter for any other value.

Formula 1 ha = 2.471054 ac

Need the other direction? Acres to Hectares.

How to convert Hectares to Acres

A hectare is exactly 10,000 square metres, or about 2.471 acres. An international acre is 4,046.8564224 square metres, historically the area a team could plough in a day.

To convert Hectares to Acres, multiply the value in ha by 2.471054. For example, 10 ha × 2.471054 = 24.710538 ac. This works because the ratio between the two units is constant for every value in area.

Worked examples

haac
1 ha2.471054 ac
2.5 ha6.177635 ac
5 ha12.355269 ac
10 ha24.710538 ac
25 ha61.776345 ac
50 ha123.552691 ac
100 ha247.105381 ac

Reverse conversion

acha
1 ac0.40468564 ha
5 ac2.023428 ha
10 ac4.046856 ha
25 ac10.117141 ha
50 ac20.234282 ha
100 ac40.468564 ha

When this conversion is useful

This is the calculation you need when you are comparing property listings, land size or building materials across measurement systems. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 ha is 2,471.05 ac.

Is the conversion exact?

Yes for practical use: the factors come from international definitions, with rounding applied only for display.

Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.

ha to ac conversion chart

The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.

Hectares (ha)Acres (ac)
1 ha2.471054 ac
2 ha4.942108 ac
3 ha7.413161 ac
4 ha9.884215 ac
5 ha12.355269 ac
6 ha14.826323 ac
7 ha17.297377 ac
8 ha19.768431 ac
9 ha22.239484 ac
10 ha24.710538 ac
11 ha27.181592 ac
12 ha29.652646 ac
13 ha32.1237 ac
14 ha34.594753 ac
15 ha37.065807 ac
16 ha39.536861 ac
17 ha42.007915 ac
18 ha44.478969 ac
19 ha46.950022 ac
20 ha49.421076 ac
21 ha51.89213 ac
22 ha54.363184 ac
23 ha56.834238 ac
24 ha59.305292 ac
25 ha61.776345 ac
26 ha64.247399 ac
27 ha66.718453 ac
28 ha69.189507 ac
29 ha71.660561 ac
30 ha74.131614 ac
31 ha76.602668 ac
32 ha79.073722 ac
33 ha81.544776 ac
34 ha84.01583 ac
35 ha86.486884 ac
36 ha88.957937 ac
37 ha91.428991 ac
38 ha93.900045 ac
39 ha96.371099 ac
40 ha98.842153 ac
41 ha101.313206 ac
42 ha103.78426 ac
43 ha106.255314 ac
44 ha108.726368 ac
45 ha111.197422 ac
46 ha113.668475 ac
47 ha116.139529 ac
48 ha118.610583 ac
49 ha121.081637 ac
50 ha123.552691 ac
60 ha148.263229 ac
70 ha172.973767 ac
80 ha197.684305 ac
90 ha222.394843 ac
100 ha247.105381 ac

Frequently asked questions

How many Acres are in 1 Hectares?

1 ha equals 2.471054 ac.

How do I convert Hectares to Acres?

Multiply the ha value by 2.471054. Example: 25 ha = 61.776345 ac.

What is 2.5 ha in ac?

2.5 ha = 6.177635 ac.

Is the ha to ac conversion exact?

Yes for practical use: the factors come from international definitions, with rounding applied only for display.

Does the calculator work offline?

Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.

Related area conversions

ft² → m²Square Feet to Square Metersm² → ft²Square Meters to Square Feetac → ft²Acres to Square Feetft² → acSquare Feet to Acresac → m²Acres to Square Metersm² → acSquare Meters to Acreskm² → mi²Square Kilometers to Square Milesac → haAcres to Hectares

All area conversions →