1 Acre equals 0.404686 Hectares.
| Acre (ac) | Hectare (ha) |
|---|---|
| 0.001 ac | 0.000404686 ha |
| 0.01 ac | 0.00404686 ha |
| 0.1 ac | 0.0404686 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 25 ac | 10.1171 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 500 ac | 202.343 ha |
| 1,000 ac | 404.686 ha |
To convert Acres to Hectares, multiply the value by 0.404686. This factor comes from the ratio of the two units' definitions: one Acre equals 0.404686 Hectares.
For example: 1 Acre = 0.404686 Hectares, and 10 Acres = 4.04686 Hectares.
To convert in the reverse direction — from Hectares to Acres — multiply by 2.47105.
The acre is a unit of land area equal to exactly 43,560 square feet, or approximately 4,047 square meters (0.4047 hectares). Its origins lie in medieval English agriculture: an acre was the amount of land that a yoke of oxen could plough in a single day — roughly a strip of land one furlong (660 feet) long and one chain (66 feet) wide. The "chain" measurement is why surveyors' chains are exactly 66 feet: four chains (264 feet) by ten chains (660 feet) equals one acre.
The acre remains the standard land measurement unit in the United States, where farmland, suburban lot sizes, and rural properties are universally measured in acres. A football field (including end zones) is about 1.32 acres; a typical suburban home lot in the US is 0.2–0.5 acres; and the 100,000-acre ranch is a recognizable large-scale farming unit. US land surveys use sections (640 acres = one square mile), townships (36 sections = 36 square miles), and ranges as the organizing framework.
The acre persists in the UK for agricultural land — farm sizes in England are quoted in acres in rural publications and land sales — even though the UK officially adopted metric units for most other purposes. Land registration in England and Wales uses hectares, but the acre's cultural resilience means both units appear in property descriptions. One acre is about 40% of a hectare, making the conversion "multiply acres by 0.4 to get approximate hectares" a rough but useful mental shortcut.
The hectare (ha) is a metric unit of area equal to 10,000 square meters — the area of a square 100 meters on each side. It is defined as exactly 0.01 square kilometers, and while it is not strictly an SI unit (the SI unit of area is the square meter), it is accepted for use alongside SI and is the international standard for measuring land area in agriculture, forestry, urban planning, and environmental science.
The hectare is universally understood in farming and land administration. A football pitch is about 0.7–1 hectare; a typical small farm in Europe might be 10–50 hectares; and the Amazon rainforest covers about 550 million hectares. Crop yields are almost always reported per hectare: wheat yields in Europe average around 7 tonnes per hectare, while rice yields in Asia run to 4–6 tonnes per hectare. Carbon sequestration in forests is measured in tonnes per hectare per year.
The hectare was introduced in 1795 as part of the original metric system, designed to replace the bewildering variety of local land measurement units — the acre in Britain, the arpent in France, the morgen in Germany, the feddan in Egypt — with a single internationally understood unit. Today virtually every country uses the hectare for official land registration and agricultural statistics, making it one of the most successful non-SI metric units.
1 Acre equals 0.404686 Hectares.
To convert Acres to Hectares, multiply by 0.404686. For example, 1 Acre = 0.404686 Hectares.
1 Hectare equals 2.47105 Acres.