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 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.