Land area converter
Hectares to Acres Converter
Enter or paste hectares or acres, then compare the same land area across six metric and U.S. units.
How to convert hectares to acres
A hectare is exactly 10,000 square meters. An international acre is exactly 4,046.8564224 square meters, so the displayed ratio is derived from two exact area definitions.
acres = hectares × (10,000 ÷ 4,046.8564224) ≈ hectares × 2.47105381467165
hectares = acres × 0.40468564224
1 ha = 10,000 m²; 1 international acre = 4,046.8564224 m²
Example: 10 ha × 2.47105381467165 = 24.7105381467165 acres.
Where hectare-to-acre conversion helps
Hectares are common in international land records, while acres remain familiar in U.S. agriculture and property listings.
Farm and forestry reports
Translate an international land figure into acres while keeping square meters and square kilometers visible for source checking.
Property comparisons
Normalize listings that switch between hectares, acres, square feet, and square miles without re-entering the parcel area.
Fire and conservation areas
Compare a large reported area across metric and U.S. units without confusing area with a parcel's side length.
Common hectares to acres chart
Acre values are rounded to six decimal places; the converter above keeps the exact definitions before display rounding.
| Hectares (ha) | Acres (ac) |
|---|---|
| 0.01 | 0.024711 |
| 0.1 | 0.247105 |
| 0.25 | 0.617763 |
| 0.5 | 1.235527 |
| 1 | 2.471054 |
| 2 | 4.942108 |
| 5 | 12.355269 |
| 10 | 24.710538 |
| 20 | 49.421076 |
| 40 | 98.842153 |
| 50 | 123.552691 |
| 100 | 247.105381 |
| 500 | 1235.526907 |
Land units, precision, and legal boundaries
The definitions are exact, but most measured or advertised parcel areas are rounded. Extra displayed decimals do not make the source survey more precise.
Hectares, acres, square meters, square kilometers, square feet, and square miles all measure area. None of them reveals a parcel's width, length, shape, slope, access, setbacks, or buildable portion.
This converter uses the international acre. Older U.S. records may use legacy survey-foot area values, so legal boundary, deed, tax, and transaction work should follow the surveyed unit stated by the responsible authority or licensed professional.
Sources and method
The unit constants come from the primary standards below. ToolNeko applies those constants in a browser-only calculation, then rounds only the displayed result.
- NIST — SI Units: Area Defines the hectare as the special name for exactly 10,000 square meters.
- NIST Handbook 44 (2026), Appendix C — General Tables of Units Lists one international acre as exactly 43,560 square feet and 0.40468564224 hectare.
Frequently asked questions
How many acres are in one hectare?
One hectare is approximately 2.4710538147 international acres.
How many hectares are in one acre?
One international acre is exactly 0.40468564224 hectares.
How many square meters are in one hectare?
One hectare is exactly 10,000 square meters, the area of a 100-meter by 100-meter square.
Is a hectare bigger than an acre?
Yes. One hectare is about 2.47 acres, so a hectare covers more than twice the area of one acre.
Does the result tell me the dimensions of the land?
No. Area alone cannot determine width, length, shape, boundaries, or usable land.