Hectares to Acres Converter
Type hectares to get acres. One hectare, a square 100 m on each side, is about 2.47 acres.
5 ha =
12.3553ac
5 hectares is 12.3553 acres.
- 1 ha
- 2.4711 ac
- 1 ac
- 0.4047 ha
How this works: Method, 3 sources,
How this works
Method
Divide hectares by 0.40468564224, or multiply by 2.47105. The divisor is the exact size of an acre in hectares: an acre is 4,046.8564224 m², and a hectare is 10,000 m², a square 100 meters on each side. Full method
Sources
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Changes
- Ask understands “5 ft 9 in to cm” and “2 cups of flour in grams” and answers at once, and a decimal comma (“2,5”) reads as 2.5.
- First published: 89 everyday units across ten quantities, with 58 pages for common pairs such as cm to inches and Celsius to Fahrenheit.
How to convert hectares to acres
Divide hectares by 0.40468564224, or multiply by 2.47105. The divisor is the exact size of an acre in hectares: an acre is 4,046.8564224 m², and a hectare is 10,000 m², a square 100 meters on each side.
A 12 hectare vineyard is 12 × 2.47105 = 29.65 acres. A 40 hectare farm is 98.84 acres, and 100 hectares, one square kilometer, is 247.1 acres.
Because a hectare is 100 m by 100 m, it is easy to pace out. An acre laid out as a square would be about 63.6 m on a side, so a hectare holds just under two and a half of those squares.
acres = hectares ÷ 0.40468564224 (≈ hectares × 2.47105)
- The hectare, symbol ha, is 1 hm² = 10,000 m², a non-SI unit accepted for use with the SI. Source: BIPM, The International System of Units (SI Brochure, 9th edition).
How to estimate hectares to acres in your head
Multiply by 2.5, then take off 1%. Two and a half acres to the hectare is very slightly too many: 12 ha × 2.5 = 30 acres, less 1% gives 29.7, against an exact 29.65.
To go quickly from square kilometers, remember that 1 km² is 100 ha, which is about 247 acres.
Hectares to acres chart
Hectares in acres, with the same area in square kilometers.
| Hectares (ha) | Acres (ac) | Square kilometers (km²) |
|---|---|---|
| 0.1 | 0.2471 | 0.001 |
| 0.25 | 0.6178 | 0.0025 |
| 0.5 | 1.2355 | 0.005 |
| 1 | 2.4711 | 0.01 |
| 2 | 4.9421 | 0.02 |
| 3 | 7.4132 | 0.03 |
| 5 | 12.3553 | 0.05 |
| 8 | 19.7684 | 0.08 |
| 10 | 24.7105 | 0.1 |
| 15 | 37.0658 | 0.15 |
Show all 19 rowsShow fewer
| 20 | 49.4211 | 0.2 |
| 30 | 74.1316 | 0.3 |
| 50 | 123.553 | 0.5 |
| 75 | 185.329 | 0.75 |
| 100 | 247.105 | 1 |
| 200 | 494.211 | 2 |
| 500 | 1,235.53 | 5 |
| 1,000 | 2,471.05 | 10 |
| 10,000 | 24,710.5 | 100 |
Frequently Asked Questions
How many acres is 1 hectare?
One hectare is 2.471 acres. Rounded, “about two and a half acres” is good enough for most conversations about land.
How many acres is 5 hectares?
5 hectares is 12.36 acres (5 × 2.47105).
How big is a hectare in feet?
A hectare is a square about 328 ft on each side (100 m ÷ 0.3048), which is 107,639 square feet.
Is the hectare an SI unit?
Not strictly. The SI unit of area is the square meter; the hectare, equal to 10,000 m², is listed by the BIPM as a non-SI unit accepted for use alongside the SI, mainly for land. A square mile, for comparison, is 259 hectares.