Hectares, Acres, and Square Metres: Land Size Reference

Updated 17 April 2026

Unit Equivalents

1 hectare

10,000 m²

107,639 ft²

2.471 acres

1 acre

4,047 m²

43,560 ft²

0.4047 ha

100 hectares

1 km²

247.1 acres

0.386 sq miles

1 sq mile

259 ha

640 acres

2.59 km²

What These Sizes Look Like

0.1 ha

1,000 m²

10,764 ft²

An Olympic swimming pool footprint. A large city building footprint.

0.4 ha (1 acre)

4,047 m²

43,560 ft²

A standard UK football pitch is about 0.7 ha. An acre is the traditional smallholding minimum.

1 ha (2.47 acres)

10,000 m²

107,639 ft²

Roughly a standard city block. A small city park. A viable smallholding for market gardening.

2 ha

20,000 m²

215,278 ft²

A typical urban park. A small vineyard. About the size of Trafalgar Square including surrounding roads.

40 ha (100 acres)

400,000 m²

4,305,560 ft²

A small farm. A medium-sized urban park. Hyde Park is 142 ha; Central Park is 341 ha.

259 ha (1 sq mile)

2,590,000 m²

27,878,501 ft²

A typical US township section. Most UK market towns cover 10-100 sq miles total.

Hectares to Acres Conversion Table

Hectares	Acres	m²	ft²
0.1	0.247	1,000	10,764
0.25	0.618	2,500	26,910
0.5	1.236	5,000	53,820
1	2.471	10,000	107,639
2	4.942	20,000	215,278
5	12.355	50,000	538,196
10	24.710	100,000	1,076,391
20	49.421	200,000	2,152,782
50	123.552	500,000	5,381,955
100	247.105	1,000,000	10,763,910
200	494.210	2,000,000	21,527,820
500	1235.525	5,000,000	53,819,550
1000	2471.050	10,000,000	107,639,100

When Each Unit is Used

Hectares (ha)

EU countries, Commonwealth (except UK agriculture), scientific and planning contexts. Used in land registration in most of the world. One hectare is exactly 100m x 100m = 10,000 m2.

Acres

UK agriculture (traditional), US real estate and land measurement. An acre is defined as 43,560 ft2 or 4,840 sq yards. The US public land survey system divides land into square miles (sections), each of 640 acres.

Square kilometres (km2)

National statistics, administrative area reporting, geography. 1 km2 = 100 hectares = 247 acres.

Square miles

US federal contexts, UK area reporting, geography. 1 sq mile = 640 acres = 258.999 ha.

Square metres (m2)

Individual property sizes, floor areas, small plots. Inappropriate for land parcels over ~2 hectares due to unwieldy numbers.

Frequently Asked Questions

How many square feet is a hectare?

1 hectare = 107,639 square feet (exactly 107,639.104 ft2). A hectare is 10,000 m2, and since 1 m2 = 10.76391041671 ft2, a hectare is 10,000 x 10.7639 = 107,639 ft2.

How many acres is a hectare?

1 hectare equals 2.47105 acres. Conversely, 1 acre equals 0.404686 hectares. The relationship: 1 acre = 4,046.86 m2, and 1 hectare = 10,000 m2, so 10,000 / 4,046.86 = 2.47105 acres per hectare.

How many square feet is an acre?

1 acre equals exactly 43,560 square feet. This is defined: 1 acre = 4,840 square yards = 4,840 x 9 = 43,560 square feet.

When do you use hectares vs acres?

Hectares are used in most of the world for agricultural land, planning permits, and land registries. The UK uses both: agricultural land is traditionally measured in acres, but planning and development uses hectares. The US exclusively uses acres. EU countries use hectares by law.

For deeper coverage of the acre conversion, see acrestosquarefeet.com.

Convert Property and Land Sizes

Square Metres (m²)

Square Feet (ft²)

10,000 m² is approximately a large supermarket floor.

The Formula

Full derivation of the 10.7639 conversion factor.

Full Conversion Table

Every m2 value 1-10,000 with context.

acrestosquarefeet.com

Dedicated acre to square feet converter.