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Hectares to acres

1 hectare = 2.47105 acres

Type a value in hectares (ha) to get acres (ac) straight away. A hectare is larger than an acre, so the number goes up. Both units belong to area, measured here against the square meter.

1 ha = 2.4710538 ac

Formula

ac = ha × 2.4710538

One hectare is 2.4710538 acres, so multiply the hectare value by that factor. Here ha is the value in hectares and ac is the result in acres.

Worked example: 3 hectares × 2.4710538 = 7.41316 acres.

Hectares to acres table

hectares (ha)acres (ac)
1 ha2.47105 ac
2 ha4.94211 ac
3 ha7.41316 ac
4 ha9.88422 ac
5 ha12.3553 ac
6 ha14.8263 ac
7 ha17.2974 ac
8 ha19.7684 ac
9 ha22.2395 ac
10 ha24.7105 ac
15 ha37.0658 ac
20 ha49.4211 ac
25 ha61.7763 ac
30 ha74.1316 ac
40 ha98.8422 ac
50 ha123.553 ac
60 ha148.263 ac
75 ha185.329 ac
100 ha247.105 ac

Everyday hectares in acres

What it ishaac
a large garden0.5 ha1.23553 ac
a football pitch (about)0.714 ha1.76433 ac
a 100 × 100 m square1 ha2.47105 ac
a small farm2 ha4.94211 ac
one square kilometer100 ha247.105 ac

Quick estimate in your head

Multiply by about 2.5. For 3 ha that gives 7.5 ac against an exact 7.41316 ac, an error of 1.2%.

About the units

Hectare (ha). 10,000 m², a square 100 m on each side. The metric unit for farmland and forests.

Acre (ac). 43,560 square feet or about 4,047 m². Used for farmland and estates in India, the US and UK.

Going the other way, 1 acre is 0.404686 hectares.

Questions

How many acres are in 1 hectare?

1 hectare is 2.47105 acres, and 1 acre is 0.404686 hectares.

How do I convert hectares to acres?

Use ac = ha × 2.4710538. For example, 3 hectares × 2.4710538 = 7.41316 acres.

Is the hectare to acre factor exact?

The factor comes from the unit definitions. Results here are rounded to 6 significant digits for display.

How much is one square kilometer in acres?

100 ha is 247.105 ac.

Source for the conversion factor: NIST Handbook 44, Appendix C (units of area).

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