Acres to Hectares Converter (ac to ha)
Type a value in acres to see it in hectares instantly.
1 acre (ac) = 0.404685642 hectares (ha)
1 hectare (ha) = 2.47105381 acres (ac)
How to convert acres to hectares
Multiply the number of acres by 0.404685642, or divide by 2.47105381.
ha = ac × 0.404685642 (or ac ÷ 2.47105381)
Example: 10 ac × 0.404685642 = 4.04686 ha
One hectare is about 2.47 acres. A square mile (640 acres) is 259 hectares.
ac to ha conversion table
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.25 ac | 0.101171 ha |
| 0.5 ac | 0.202343 ha |
| 1 ac | 0.404686 ha |
| 2 ac | 0.809371 ha |
| 2.47 ac | 0.999574 ha |
| 5 ac | 2.02343 ha |
| 10 ac | 4.04686 ha |
| 20 ac | 8.09371 ha |
| 25 ac | 10.1171 ha |
| 40 ac | 16.1874 ha |
| 50 ac | 20.2343 ha |
| 100 ac | 40.4686 ha |
| 160 ac | 64.7497 ha |
| 200 ac | 80.9371 ha |
| 500 ac | 202.343 ha |
| 640 ac | 258.999 ha |
| 1,000 ac | 404.686 ha |
About the units
Acre (ac)
An acre is 43,560 square feet, or about 4,046.86 square meters. It is the usual unit for land in the US and UK.
Hectare (ha)
A hectare is 10,000 square meters — a square 100 m on each side. It is the standard metric unit for farmland and forests.
Frequently asked questions
How many hectares are in 1 acre?
1 acre equals 0.404685642 hectares.
How do I convert acres to hectares?
Multiply the number of acres by 0.404685642, or divide by 2.47105381. For example, 10 ac × 0.404685642 = 4.04686 ha.
How many acres are in 1 hectare?
1 hectare equals 2.47105381 acres.
Which is bigger, an acre or a hectare?
A hectare is bigger: 1 ha = 2.471 acres, and 1 acre = 0.405 ha.
Related conversions
- m² to ft²Square Meters to Square Feet
- km to miKilometers to Miles
- in to cmInches to Centimeters
- kg to lbKilograms to Pounds
- °C to °FCelsius to Fahrenheit
- L to galLiters to Gallons (US)
- Mbps to MB/sMegabits per Second to Megabytes per Second
Background reading: Metric vs. Imperial.