Acres to Hectares Converter

One acre equals 0.404686 hectares. Multiply acres by 0.4047 to convert. For example, 10 acres = 4.05 hectares. Quick estimate: 2.5 acres make roughly 1 hectare.

Acres

Hectares

Common Conversions

Key Takeaways

1 acre = 0.404686 hectares. Multiply acres by 0.4047 to get hectares.
1 hectare = 2.47105 acres. Roughly 2.5 acres per hectare.
1 acre = 43,560 sq ft (about 90% of a football field).
1 hectare = 10,000 m² (100m × 100m).
Most countries use hectares. The US and UK commonly use acres.

How Do You Convert Acres to Hectares?

Multiply the number of acres by 0.404686 to get hectares. The formula is: Hectares = Acres × 0.404686. To convert back, divide hectares by 0.404686 or multiply by 2.47105. For quick mental math, remember that 2.5 acres is roughly 1 hectare.

Sam Okafor lists rural properties near Pinewood Falls that often include acreage. When international buyers inquire about a 15-acre parcel, he converts: 15 × 0.4047 = 6.07 hectares. European and Asian buyers immediately understand the scale, since hectares are the global standard for agricultural and development land.

Land Size Reference Table

Acres	Hectares	Comparable Size
0.25 ac	0.10 ha	Typical suburban lot
0.5 ac	0.20 ha	Large residential lot
1 ac	0.40 ha	About 90% of a football field
5 ac	2.02 ha	Small hobby farm
10 ac	4.05 ha	Large estate / small farm
40 ac	16.19 ha	Quarter section (historical US)
100 ac	40.47 ha	Small commercial farm
160 ac	64.75 ha	One section (historical homestead)
640 ac	259.00 ha	One square mile
1,000 ac	404.69 ha	Large farm / ranch

Acres vs. Hectares in Practice

Agriculture

US farmers measure fields in acres, while farmers in most other countries use hectares. Crop yields are reported per acre in the US (e.g., 175 bushels of corn per acre) and per hectare elsewhere (e.g., 11 tonnes per hectare). When comparing agricultural data internationally, this conversion is essential.

Real Estate and Land Development

International land transactions increasingly require both units. A 50-acre development site (20.23 ha) might be marketed to both US and international investors. Dana Kowalski works on projects where site plans need to show both measurements for permitting with different government agencies.

Conservation and Forestry

Environmental reports and conservation data from international organizations typically use hectares. The Amazon rainforest loses approximately 1 million hectares per year. In US terms, that is about 2.47 million acres. National parks and nature reserves publish their areas in both units for domestic and international audiences.

For related conversions, try the hectares to acres converter for the reverse calculation, the square footage calculator for property area calculations, or the square feet to square meters converter for smaller area conversions.

This converter uses the internationally defined conversion factor of 1 acre = 0.404686 hectares. For official land surveys and legal property descriptions, consult a licensed surveyor in your jurisdiction.

Frequently Asked Questions

How many hectares are in an acre?

One acre equals 0.404686 hectares. For a quick estimate, one acre is roughly 0.4 hectares, or 2.5 acres make 1 hectare. An acre is 43,560 square feet and a hectare is 10,000 square meters.

How do I convert acres to hectares?

Multiply the number of acres by 0.404686. For example, 10 acres = 10 × 0.4047 = 4.047 hectares. To convert hectares to acres, divide by 0.4047 or multiply by 2.471.

How big is an acre?

An acre is 43,560 square feet, roughly the size of a football field without the end zones (which is 48,000 sq ft). More precisely, an acre is about 90% of a football field. It is equivalent to a square that is about 209 feet on each side.

How big is a hectare?

A hectare is exactly 10,000 square meters (100m × 100m). It is about 2.47 acres or roughly 2.5 football fields. A hectare is approximately the area of a standard running track oval with the infield included.

Which countries use hectares vs. acres?

Most of the world uses hectares for land measurement, including all countries that use the metric system. The United States, United Kingdom, and a few former British colonies still commonly use acres, though the UK officially switched to hectares for government land records.

How often do people need to convert acres to hectares?

Real estate professionals working with international buyers use this conversion regularly. Farmers and agricultural researchers convert when comparing yields or reading international reports. Environmental scientists encounter it frequently in conservation literature. For most people, it comes up occasionally when reading about land sizes in international news or evaluating rural property listings.