Hectares to Acres Converter

One hectare is 2.471 acres — geometry against a day's ploughing, converted for land and crop figures.

Conversion table

Area	In acres
0.5	1.2355 ac
1	2.4711 ac
1.5	3.7066 ac
2	4.9421 ac
2.5	6.1776 ac
3	7.4132 ac
4	9.8842 ac
5	12.3553 ac
6	14.8263 ac
7	17.2974 ac
8	19.7684 ac
9	22.2395 ac
10	24.7105 ac
12	29.6526 ac
15	37.0658 ac

🚜 Land areas to know

1 hectare2.4711 acres
1 acre0.4047 ha
1 hectare10,000 m²
1 acre43,560 ft²

Comparing land across systems

A hectare is two and a half acres, near enough for a conversation: multiply hectares by 2.5 and take off 1%.
Yields are the real trap. A crop quoted at 8 tonnes per hectare is 3.2 tonnes per acre, and comparing the two figures directly overstates the American farm by two and a half times.
One square kilometre is exactly 100 hectares, or 247 acres. Forestry and municipal land usually switch to km² above a few hundred hectares.
A hectare is a square 100 m on a side, which is easy to pace out. An acre has no natural shape at all.

One unit from geometry, one from a day's work

The hectare is defined by the metre and nothing else: a square 100 metres on a side, 10,000 square metres exactly. It is not an SI unit but is accepted for use with the SI, precisely because land needs a unit between the square metre and the square kilometre. The acre came from the opposite direction, as the area a man with a yoke of oxen could plough in a day, and it was standardised at 43,560 square feet. Dividing one by the other gives 2.471054 acres per hectare — an ugly number because the two systems were never designed to meet.

Why an acre is a long thin rectangle

Ploughing with oxen was slow to turn, so medieval fields were laid out long and narrow to minimise the number of turns. The traditional acre is one furlong by one chain: 660 feet by 66 feet, which is 43,560 square feet. That shape is why the acre has no side length worth quoting, and why the word survives in furlong, chain and the layout of old field boundaries still visible from the air across England. The hectare, arriving with the metric system in the 1790s, simply took the tidiest square that suited farming.

Land areas you can picture

A hectare is a square 100 m on a side — roughly the footprint of a large city block.
An association football pitch is 0.62–0.82 ha, so about 1.5 to 2 acres.
An American football field including end zones is 0.535 ha, or 1.32 acres.
A square kilometre is 100 ha, or 247 acres.
Central Park in New York is 341 ha, which is 843 acres.
A hectare of solar panels generates roughly 0.5 to 1 MW at peak, depending on the technology.

Where the two units live

Europe, Latin America, Asia and Africa quote farm size and crop yield per hectare.
The United States and the United Kingdom quote per acre, and the USDA publishes all its acreage statistics that way.
EU agricultural payments and land registers are per hectare, which makes the unit administrative as well as agricultural.
Forestry and conservation usually work in hectares everywhere, even in the US, for compatibility with international data.
Real estate in the UK often mixes them: a rural listing gives acres, a building plot gives square metres.
Yield figures are the single most-misread number: never compare tonnes per hectare with bushels per acre without converting both.

Worked examples

Farms and yields

A 50 hectare farm

50 × 2.471054 = 123.6 acres
50 ha = 500,000 m² = 0.5 km²
Mental check: 50 × 2.5 = 125, minus 1%

50 ha = 123.6 acres

A yield of 8 tonnes per hectare

8 ÷ 2.471054 = 3.24 tonnes per acre
In American units: 3.24 t/acre = 7,140 lb per acre
For maize at 25.4 kg per bushel, roughly 127 bushels per acre

8 t/ha = 3.24 t/acre

Frequently Asked Questions

How many acres is 1 hectare?

2.471054 acres. The hectare is 10,000 square metres and the acre is 4,046.856 square metres, so the ratio falls out of the two definitions. For a mental estimate, multiply hectares by 2.5 and take off about one per cent.

How big is a hectare?

A square 100 metres on each side, which is 10,000 square metres. It is roughly one and a half association football pitches, or about two and a half acres. The neat shape is why it caught on: you can pace out a hectare, but not an acre.

Why is an acre such an odd number of square feet?

Because it was never a square. The traditional acre is a furlong by a chain, 660 feet by 66 feet, a long strip shaped by how slowly a team of oxen could turn a plough. That rectangle comes to 43,560 square feet, which is exact but has no memorable side length.

How do I convert crop yields between the two?

Divide the per-hectare figure by 2.471054 to get per acre, and multiply the other way. A yield of 10 tonnes per hectare is 4.05 tonnes per acre. Comparing the raw numbers without converting is the most common error in agricultural reporting, and it makes hectare-based yields look two and a half times better.

Is the hectare an SI unit?

No, but it is on the short list of non-SI units accepted for use with the SI, alongside the litre and the tonne. Land measurement needed something between the square metre and the square kilometre, and the hectare fills the gap without breaking the decimal structure.

How many hectares in a square kilometre?

Exactly 100, because a square kilometre is 1,000 metres on a side and a hectare is 100. That also makes a square kilometre 247.1 acres. Forestry, conservation and municipal land statistics usually switch to square kilometres once the numbers pass a few hundred hectares.