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Area
Hectares to Acres
Convert hectares (ha) to acres (ac). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 ha = 2.4711 ac
Hectares to Acres Conversion Table
Common values, ready to copy:
| hectares | acres |
|---|---|
| 1 ha | 2.4711 ac |
| 2 ha | 4.9421 ac |
| 5 ha | 12.3553 ac |
| 10 ha | 24.7105 ac |
| 25 ha | 61.7763 ac |
| 50 ha | 123.55 ac |
| 100 ha | 247.11 ac |
| 1,000 ha | 2471.05 ac |
Formula
acres = hectares × 2.47105163e+0
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
About Hectares and Acres
Hectares (ha): Ten thousand square meters, or 100 m × 100 m; from the Greek hekaton meaning hundred (referring to the hundred-fold of an are, an obscure unit). Common uses: Land area in metric countries — agriculture, forestry, real estate (especially rural), and conservation.
Acres (ac): An old English unit, originally the area a yoke of oxen could plow in a day; standardized at exactly 4,046.86 m² (43,560 sq ft). Common uses: Land area in the US, UK, and most former British colonies — farm sizes, residential lots, and ranch acreage.
How the conversion works
Area conversions are derived from length: 1 ft² = (0.3048 m)² = 0.092903 m². 1 acre = 4,046.86 m². 1 hectare = 10,000 m² exactly.
The exact relationship is acres = hectares × 2.47105163e+0, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between hectares and acres comes up wherever area measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.