Hectares to Acres Converter
Convert hectares (ha) to acres (ac). One hectare equals 2.47105 acres, so multiply a value in hectares by 2.47105 to get acres.
Formula: multiply the source value by 2.47105381
Quick Conversions
About this tool
A hectare is 10,000 square meters, the area of a square 100 meters on each side. The international acre is 43,560 square feet, exactly 4,046.8564224 square meters. Because 1 hectare is 10,000 square meters and 1 acre is 4,046.8564224 square meters, the factor is their ratio, 2.47105381467.
How to use it
- Type a value in hectares in the first field. The unit menus start on ha → ac.
- Read the result in acres. It updates as you type; use Precision to choose how many decimals are shown.
- Press the swap button, or open the Acres to Hectares converter, to convert acres back to hectares.
ac = ha × 2.47105381467
ha = ac ÷ 2.47105381467
Examples
1 ha to ac
1 ha × 2.47105 = 2.47105 ac.
2.5 ha to ac
2.5 ha × 2.47105 = 6.17763 ac.
100 ha to ac (one square kilometer)
100 ha × 2.47105 = 247.105 ac.
Hectares to acres conversion table
| Hectares (ha) | Acres (ac) |
|---|---|
| 0.25 | 0.617763 |
| 0.5 | 1.23553 |
| 1 | 2.47105 |
| 2 | 4.94211 |
| 5 | 12.3553 |
| 10 | 24.7105 |
| 20 | 49.4211 |
| 50 | 123.553 |
| 100 | 247.105 |
| 500 | 1,235.53 |
| 1,000 | 2,471.05 |
Acres to hectares (reverse)
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 | 0.404686 |
| 5 | 2.02343 |
| 10 | 4.04686 |
| 50 | 20.2343 |
| 100 | 40.4686 |
FAQ
How many acres are in one hectare?
One hectare is 2.47105 acres. The unrounded factor is 2.47105381467.
How do I convert acres back to hectares?
Divide by 2.47105, or multiply by 0.404686. For example, 10 ac is 4.04686 ha.
How big is a hectare?
10,000 m², a square 100 m on each side. That is about 2.47 acres, and 100 hectares make one square kilometer.
Is the conversion exact?
Yes, before rounding. The square foot, square yard, and acre are all defined exactly in square meters through the international foot (0.3048 m).