Acres to Hectares Converter
1 acre ≈ 0.404685642 hectares
1 acre equals 0.404686 hectares
How to convert acres to hectares
Area factors are squared length factors: 1 ft² = (0.3048 m)². The acre here uses international feet; historic US survey acres differ slightly.
ha = ac × 0.4046856422One acre is 0.4046856422 hectares, so a single multiplication converts any value.
4.04686 ha ≈ 10 × 0.4046856422Acres to hectares conversion table
Common values in acres, converted to hectares.
| Acres (ac) | Hectares (ha) |
|---|---|
| 1 | 0.40468564 |
| 2 | 0.80937128 |
| 3 | 1.2140569 |
| 4 | 1.6187426 |
| 5 | 2.0234282 |
| 10 | 4.0468564 |
| 20 | 8.0937128 |
| 25 | 10.117141 |
| 50 | 20.234282 |
| 100 | 40.468564 |
| 250 | 101.17141 |
| 500 | 202.34282 |
| 1,000 | 404.68564 |
About these units
acreac
Exactly 4,840 square yards, or 43,560 square feet. The customary land unit.
Reference: Derived from the international yard (1959).
hectareha
Exactly 10,000 square metres, a square 100 m on each side. The metric land unit.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.