Area converter

Square Meters to Acres

Square Meters and Acres measure the same quantity in different unit systems. The relationship is 1 m² = 2.4711e-04 ac, which gives 2.4711e-04 ac per m². Below you can convert any value, check a worked example and read the full chart.

Square Meters (m²)

Acres (ac)

Formula 1 m² = 2.4711e-04 ac

Need the other direction? Acres to Square Meters.

How to convert Square Meters to Acres

The square metre is the SI unit of area and the standard unit in property listings. An international acre is 4,046.8564224 square metres, historically the area a team could plough in a day.

To convert Square Meters to Acres, multiply the value in m² by 2.4711e-04. For example, 10 m² × 2.4711e-04 = 0.00247105 ac. This works because the ratio between the two units is constant for every value in area.

Worked examples

m²	ac
1 m²	2.4711e-04 ac
2.5 m²	6.1776e-04 ac
5 m²	0.00123553 ac
10 m²	0.00247105 ac
25 m²	0.00617763 ac
50 m²	0.01235527 ac
100 m²	0.02471054 ac

Reverse conversion

ac	m²
1 ac	4,046.86 m²
5 ac	20,234.28 m²
10 ac	40,468.56 m²
25 ac	101,171.41 m²
50 ac	202,342.82 m²
100 ac	404,685.64 m²

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 m² is 0.24710538 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.

m² 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.

Square Meters (m²)	Acres (ac)
1 m²	2.4711e-04 ac
2 m²	4.9421e-04 ac
3 m²	7.4132e-04 ac
4 m²	9.8842e-04 ac
5 m²	0.00123553 ac
6 m²	0.00148263 ac
7 m²	0.00172974 ac
8 m²	0.00197684 ac
9 m²	0.00222395 ac
10 m²	0.00247105 ac
11 m²	0.00271816 ac
12 m²	0.00296526 ac
13 m²	0.00321237 ac
14 m²	0.00345948 ac
15 m²	0.00370658 ac
16 m²	0.00395369 ac
17 m²	0.00420079 ac
18 m²	0.0044479 ac
19 m²	0.004695 ac
20 m²	0.00494211 ac
21 m²	0.00518921 ac
22 m²	0.00543632 ac
23 m²	0.00568342 ac
24 m²	0.00593053 ac
25 m²	0.00617763 ac
26 m²	0.00642474 ac
27 m²	0.00667185 ac
28 m²	0.00691895 ac
29 m²	0.00716606 ac
30 m²	0.00741316 ac
31 m²	0.00766027 ac
32 m²	0.00790737 ac
33 m²	0.00815448 ac
34 m²	0.00840158 ac
35 m²	0.00864869 ac
36 m²	0.00889579 ac
37 m²	0.0091429 ac
38 m²	0.00939 ac
39 m²	0.00963711 ac
40 m²	0.00988422 ac
41 m²	0.01013132 ac
42 m²	0.01037843 ac
43 m²	0.01062553 ac
44 m²	0.01087264 ac
45 m²	0.01111974 ac
46 m²	0.01136685 ac
47 m²	0.01161395 ac
48 m²	0.01186106 ac
49 m²	0.01210816 ac
50 m²	0.01235527 ac
60 m²	0.01482632 ac
70 m²	0.01729738 ac
80 m²	0.01976843 ac
90 m²	0.02223948 ac
100 m²	0.02471054 ac

Frequently asked questions

How many Acres are in 1 Square Meters?

1 m² equals 2.4711e-04 ac.

How do I convert Square Meters to Acres?

Multiply the m² value by 2.4711e-04. Example: 25 m² = 0.00617763 ac.

What is 2.5 m² in ac?

2.5 m² = 6.1776e-04 ac.

Is the m² 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.

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