Acres to Hectares Converter
This acres to hectares converter turns acres into hectares (ha) as you type, rounded to at most six decimal places. It works both ways: type in the hectares box and you get acres back.
Common conversions
10 acres is 4.047 hectares. Other common sizes:
How to convert acres to hectares
Multiply acres by 0.404686. The full factor is 0.40468564224, because an acre is exactly 43,560 square feet, or 4,046.8564224 square meters, and a hectare is exactly 10,000 square meters.
Hectares = acres × 0.404686
- Take the area in acres. The average US farm is 463 acres, per the 2022 Census of Agriculture.
- Multiply by 0.404686. 463 × 0.404686 = 187.37 ha. The converter shows 187.369452.
- Round at the end, to two decimals for land.
Mental check: multiply acres by 4, then divide by 10. 250 acres becomes 100 ha against an exact 101.17, so the shortcut reads about 1.2 percent low.
For room and floor areas, you convert square feet to square meters the same way, multiplying by 0.0929.
Hectares to acres
Multiply hectares by 2.471054. A 3.5 hectare property abroad is 8.648688 acres in the converter, so about 8.65 acres.
You'll need it for international data: FAO land use statistics are reported in thousands of hectares, while USDA reports acres.
Hectares to acres table, 0.1 to 100 ha
| Hectares | Acres |
|---|---|
| 0.1 | 0.2471 |
| 0.25 | 0.6178 |
| 0.5 | 1.2355 |
| 1 | 2.4711 |
| 2 | 4.9421 |
| 5 | 12.3553 |
| 10 | 24.7105 |
| 20 | 49.4211 |
| 50 | 123.5527 |
| 100 | 247.1054 |
A hectare in square meters and square feet
A hectare is exactly 10,000 square meters: NIST calls it a special name for 10,000 m², a square 100 meters on each side.
sq ft in 1 ha
sq yd in 1 ha
To go from square feet to hectares, multiply by 0.0000092903. Under about an acre, square feet are the practical unit: the square footage to acres converter handles lots, and the lawn calculator measures a yard. For a lot made of several shapes, the main calculator adds them and shows the total in acres. For metric floor areas use square meters to square feet, and for every unit at once the area converter.
Square miles and square kilometers
A square mile is 640 acres, so a quarter section of 160 acres is 64.75 hectares.
Common mistakes
That's the reverse factor. The hectare figure is always the smaller number; if yours came out bigger, multiply by 0.404686 instead.
An are is 100 m², a hundredth of a hectare. Divide a figure in ares by 100 to get hectares.
Pre-2023 US records may use the survey acre, 4,046.8726 m². That's 4 parts per million more, far below anything a deed rounds to.
Frequently asked questions
How many acres are in a hectare?
2.471 acres. A hectare's 10,000 square meters divided by an acre's 4,046.86 gives 2.4710538.
How many hectares is 1 acre?
0.4047 hectares, or 4,046.86 square meters.
What is a hectare?
A metric unit of land area equal to 10,000 square meters, a square 100 meters on each side. Its symbol is ha.
How many square feet is a hectare?
107,639 square feet, about two and a half times the 43,560 square feet in an acre.
Is a hectare bigger than an acre?
Yes, about 2.5 times bigger: 1 hectare is 2.471 acres.
How many hectares are in a square kilometer?
100 hectares, which is 247.1 acres. A square mile is bigger: 259 hectares.