The short answer
1 hectare equals 2.47105 acres exactly, or 10,000 square meters, or 107,639 square feet. The hectare is the metric system’s working unit for medium-to-large property and farmland. Most of the world uses hectares; the United States uses acres; the United Kingdom uses both depending on context.
For converting between them in your head, multiply hectares by 2.5 to get acres (within 1.2 percent), or divide acres by 2.5 to get hectares. For exact conversions, use the calculator on the homepage or the precise factor of 2.47105.
This guide explains where each unit comes from, where each is used today, and how to read international real estate listings that mix the two.
Where the hectare comes from
The hectare is a metric unit, but unlike most metric units, it is not strictly an SI unit. The square meter is the SI unit for area. The hectare is a convenience multiple of the square meter, just like the liter is a convenience multiple of the cubic meter for volume.
The definition is simple and clean:
A hectare is a square 100 meters on each side. That makes it about 328 ft on each side, or roughly the length of an American football field on every side. Visualize a square the size of two football fields placed side by side, and you have a hectare.
The name “hectare” combines the Greek prefix “hecto-” (meaning 100) with “are” (a metric area unit, 100 sq m). One are equals 100 sq m, and one hectare equals 100 ares. The “are” unit is rarely used today outside of agricultural land valuation in some French-speaking regions. The hectare is the dominant unit.
The hectare was formalized in the 1795 French metric reform and spread internationally with the adoption of the metric system. Every metric country uses it for the same purpose: medium-to-large land areas where square meters would be too small a unit and square kilometers too large.
The exact conversion
The conversion between hectares and acres derives from the exact 1 ft = 0.3048 m relationship squared:
So one hectare is 2.47105 acres. Equivalently, one acre is 0.40469 hectares.
For everyday conversion:
| Hectares | Acres (exact) | Acres (rounded) |
|---|---|---|
| 0.1 | 0.247 | 0.25 |
| 0.25 | 0.618 | 0.6 |
| 0.5 | 1.236 | 1.25 |
| 1 | 2.471 | 2.5 |
| 2 | 4.942 | 5 |
| 5 | 12.355 | 12 |
| 10 | 24.711 | 25 |
| 25 | 61.776 | 62 |
| 50 | 123.553 | 124 |
| 100 | 247.105 | 247 |
| 1,000 | 2,471 | 2,500 |
The “multiply by 2.5” shortcut works for any value with about 1 percent error. For technical conversion, use the exact 2.471 factor.
Where each unit is used
The acre and hectare split the world roughly along the line of which countries did or did not officially adopt the metric system before 1900.
Acre-using regions:
- United States (primary land-area unit for all property)
- United Kingdom (still used for farmland and some real estate)
- Republic of Ireland (legacy, increasingly replaced by hectares)
- Some Commonwealth countries informally
Hectare-using regions:
- All of continental Europe
- Canada (officially, though acres still appear in informal real estate)
- Australia (officially since 1970s, with acres surviving informally)
- New Zealand (officially)
- Latin America (all countries)
- Africa (most countries)
- Asia (most countries, with exceptions for traditional units in rural areas)
The dividing line in practice is the United States. Within US real estate, hectares almost never appear. Outside the US in international real estate, hectares dominate, with acres appearing only in markets that historically catered to British or American buyers.
A few countries have traditional area units that compete with hectares: Japan’s 反 (tan), about 992 sq m; India’s bigha, varying by region from 1,500 to 6,800 sq m. These are mostly used in rural land transactions and increasingly replaced by hectares or square meters in official records.
Reading international real estate listings
A 0.5 hectare villa in Provence is about 1.24 acres, or roughly 53,800 sq ft. That is a comfortable-sized lot by US suburban standards, large by European standards.
A 5 hectare farm in Argentina is about 12.4 acres, a hobby-farm size in US terms.
A 100 hectare estate in Scotland is about 247 acres, a small working farm.
A 1,000 hectare ranch in Australia is about 2,471 acres, a large ranch but not extraordinary by Outback standards. Major Australian cattle stations span tens of thousands of hectares.
The mental anchor for international comparison:
1 hectare ≈ 2.5 acres ≈ 2 American football fields ≈ 107,000 sq ft
That anchor lets you read most international listings without needing a calculator. For exact values, the meters-to-feet calculator on the homepage and our acre deep-dive guide give the precise numbers.
Why two units survive
The simple answer is that switching costs are too high to justify. Every US land deed, zoning ordinance, and tax record uses acres. Re-stating millions of legal documents in hectares would be expensive and add no value to the parties involved. The same logic applies in reverse to metric countries that would have to translate their cadastral records to acres.
International real estate transactions handle the dual system by converting at the point of sale. A US buyer purchasing French farmland sees the area in hectares on the listing, and the closing documents in France use hectares. The buyer mentally translates to acres for sizing intuition, but the legal document does not.
Modern property databases (Zillow internationally, French SeLoger, German ImmoScout24) usually display both units when the source data permits, but the underlying registry is always in the country’s official unit.
Small-area metric: square meters
For properties below a hectare, the working unit in metric countries is the square meter (sq m). Apartments are listed in sq m. Small urban lots are listed in sq m. The transition to hectares typically happens around 0.5 to 1 hectare.
A few size benchmarks in metric for orientation:
| Property type | Typical metric size |
|---|---|
| Small studio apartment | 25 to 40 sq m |
| Average European apartment | 60 to 100 sq m |
| European house lot (urban) | 200 to 500 sq m |
| Suburban house lot | 500 to 1,500 sq m |
| Large suburban / rural | 0.2 to 1 hectare |
| Hobby farm | 1 to 10 hectares |
| Working farm | 10+ hectares |
A 1,000 sq m lot equals 0.1 hectares equals 0.247 acres. Use the meters-to-feet calculator for any specific value.
For converting from inches-per-foot to square meters, see our companion guide Convert metric blueprints to feet and inches for DIY, which covers the practical workflow for working between systems.
Sources and further reading: