Acres to Hectares formula
1 acre = 0.4046856422 hectares, and 1 hectare = 2.471053815 acres. 43,560 sq ft (4,046.86 m²). In Punjab land records an acre (killa) is 8 kanal.
Acres to Hectares chart
| Acres (ac) | Hectares (ha) |
|---|---|
| 0.25 | 0.1012 |
| 0.5 | 0.2023 |
| 1 | 0.4047 |
| 2 | 0.8094 |
| 2.5 | 1.0117 |
| 3 | 1.2141 |
| 4 | 1.6187 |
| 5 | 2.0234 |
| 10 | 4.0469 |
| 15 | 6.0703 |
| 20 | 8.0937 |
| 25 | 10.1171 |
| 40 | 16.1874 |
| 50 | 20.2343 |
| 100 | 40.4686 |
| 160 | 64.7497 |
| 250 | 101.1714 |
| 500 | 202.3428 |
| 640 | 258.9988 |
| 1,000 | 404.6856 |
Values are rounded to 4 decimal places. The converter above shows more precision.
Worked examples
A 10-acre smallholding
10 ac × 0.4046856422 = 4.0469 ha
10 acres = 4.0469 hectares. About 4.05 hectares, a size that is often advertised in Europe as "4 ha".
A square mile (640 acres)
640 ac × 0.4046856422 = 258.9988 ha
640 acres = 258.9988 hectares. Almost exactly 259 hectares, or 2.59 square kilometres.
Converting acres to hectares in real life
Farmland, estates, parks and large building plots are measured in acres in the US, the UK, India and Pakistan, and in hectares in most of Europe, Australia and international statistics such as crop yields. Converting lets you compare land prices per hectare, read a farm sale abroad, or follow an agronomy guide written for the other unit.
An acre is 43,560 square feet (4,046.86 m²). A hectare is a square 100 m on each side (10,000 m²), so it is roughly two and a half acres. In Punjab land records an acre is also called a killa and is split into 8 kanal; the land area converter handles those units.