Hectares to Acres: The Formula
Acres = Hectares × 2.47105
One hectare equals 2.47105 acres. Conversely, one acre equals 0.404686 hectares.
Quick Conversion Table: Hectares to Acres
| Hectares | Acres |
|---|---|
| 0.1 ha | 0.247 acres |
| 0.25 ha | 0.618 acres |
| 0.5 ha | 1.236 acres |
| 1 ha | 2.471 acres |
| 2 ha | 4.942 acres |
| 5 ha | 12.355 acres |
| 10 ha | 24.711 acres |
| 20 ha | 49.421 acres |
| 50 ha | 123.553 acres |
| 100 ha | 247.105 acres |
| 500 ha | 1,235.526 acres |
| 1,000 ha | 2,471.054 acres |
Acres to Hectares Conversion Table
| Acres | Hectares |
|---|---|
| 1 acre | 0.405 ha |
| 2 acres | 0.809 ha |
| 5 acres | 2.023 ha |
| 10 acres | 4.047 ha |
| 25 acres | 10.117 ha |
| 50 acres | 20.234 ha |
| 100 acres | 40.469 ha |
| 500 acres | 202.343 ha |
| 1,000 acres | 404.686 ha |
Hectare vs Acre: What's the Difference?
| Hectare | Acre | |
|---|---|---|
| System | Metric | Imperial / US Customary |
| Definition | 10,000 m² (100m × 100m) | 43,560 sq ft (1 furlong × 1 chain) |
| Size | 2.471 acres | 0.405 hectares |
| Used in | Most of the world | USA, UK, Canada, some others |
| Sq meters | 10,000 m² | 4,047 m² |
Which Countries Use Hectares vs Acres?
Countries using hectares (metric)
The vast majority of the world uses hectares for agricultural and land measurement, including all of Europe, South America, Asia, Africa, and Australia. Hectares are the official unit under the International System of Units (SI).
Countries using acres (imperial)
The United States primarily uses acres. The United Kingdom uses both — acres for historical land records and everyday use, hectares in official agricultural statistics. Canada uses both depending on context.
Real-World Size References
| Reference | Size in Hectares | Size in Acres |
|---|---|---|
| Soccer/football field | ~0.71 ha | ~1.76 acres |
| American football field | ~0.53 ha | ~1.32 acres |
| Average UK farm | ~87 ha | ~215 acres |
| Average US farm | ~180 ha | ~445 acres |
| Central Park, NYC | ~341 ha | ~843 acres |
| 1 km² | 100 ha | 247 acres |
Why Knowing Both Units Matters
International real estate, agricultural trade, and environmental reporting often require conversions between hectares and acres. A farm in Germany measured in hectares needs conversion for a US buyer who thinks in acres. A property listed in acres needs conversion for European valuation reports.
How to Measure Your Land in Hectares or Acres
LandLens lets you measure land in any unit — acres, hectares, square meters, square feet, and more. Walk the boundary with your iPhone, or tap corners on a satellite map, and switch between units instantly in the app.
- GPS accuracy to within 3-5 meters
- Works offline in remote areas
- Export to PDF, KML, GeoJSON, or Shapefile
Frequently Asked Questions
Is a hectare bigger than an acre?
Yes. One hectare = 2.471 acres. A hectare is approximately 2.5 times larger than an acre.
How many hectares in a square kilometer?
100 hectares = 1 km². A square kilometer is 1,000m × 1,000m = 1,000,000 m² = 100 ha.
What is 5 hectares in acres?
5 hectares × 2.47105 = 12.355 acres.
What is 100 acres in hectares?
100 acres × 0.404686 = 40.47 hectares.
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