Convert hectares to acres (ha to ac)
To convert hectares to acres, divide the value in hectares by 0.40468564224 — the same as multiplying by about 2.47105. It is used to express farmland, vineyards, parks and forests from metric listings in acres. This hectares to acres converter works both ways: type hectares or acres into either box above and the other box, the worked formula and the chart below update as you type.
The hectare (ha) is a metric unit of area equal to 10,000 m² — a square 100 meters on each side. A full-size football pitch covers roughly 0.7 ha. Hectares are the standard unit for farmland, forests and land-use statistics in most countries. One hectare is 2.47105 acres.
The acre (ac) is a unit of land equal to 43,560 square feet, or exactly 4,046.8564224 m². It began as the area a team of oxen could plough in a day and was later fixed as one furlong by one chain. Going the other way, one acre equals 0.404686 hectares. Acres are used for land and farm sizes in the US, UK, India, Canada and Australia.
How to convert hectares to acres with this tool
- Type a number into the Hectares (ha) box — it starts at 1 ha as an example.
- Read the answer in the Acres (ac) box and in the result panel, which also shows the formula with your number.
- To go the other way, type into the acres box, or press the swap button to open the Acres to Hectares converter with your value carried over.
- Choose how many decimal places you want, or tap a quick value such as 0.5 ha, 2 ha, 5 ha.
- Press Copy result to paste the conversion into a message, spreadsheet or note.
Hectares to Acres converter features
Converts both ways
Type in the hectares box to get acres, or in the acres box to get hectares. The other box follows instantly.
Exact factor
Calculations use 1 ac = 0.40468564224 ha, and rounding is applied only to the answer you see — choose Auto or 0–10 decimal places.
Formula with your number
The working is shown under the result, for example 1 ha ÷ 0.40468564224 = 2.4711 ac, so you can check it or copy the method.
Quick values and chart
Tap common values like 0.5 ha, 2 ha, 5 ha, or read the hectares-to-acres table further down this page.
Hectares to Acres formula
The formula is ac = ha ÷ 0.40468564224. It is exact because an international acre is exactly 4,046.8564224 m² and a hectare is 10,000 m².
The reverse formula is ha = ac × 0.40468564224 — or use the Acres to Hectares converter. Three worked examples:
- One hectare: 1 ha ÷ 0.40468564224 = 2.4711 ac
- A 10 ha farm: 10 ha ÷ 0.40468564224 = 24.7105 ac
- One square kilometer (100 ha): 100 ha ÷ 0.40468564224 = 247.1054 ac
Hectares to Acres quick reference
The values people look up most often, worked out with the exact factor:
- 1 ha = 2.47105 ac
- 1 ac = 0.404686 ha
- 0.5 ha = 1.2355 ac
- 2 ha = 4.9421 ac
- 5 ha = 12.3553 ac
- 10 ha = 24.7105 ac
Quick tip: Multiply by 2.5 for a quick estimate (about 1% high): 8 ha ≈ 20 acres, versus the exact 19.7684 acres.
Related conversions: Square Feet to Acres, Acres to Square Feet and the full area converter.
Hectares to Acres conversion table
Values in acres are rounded to 4 decimal places (more for very small numbers). For any value not listed, type it into the converter above.
| ha | ac | ha | ac |
|---|---|---|---|
| 0.1 | 0.2471 | 20 | 49.4211 |
| 0.25 | 0.6178 | 25 | 61.7763 |
| 0.5 | 1.2355 | 50 | 123.5527 |
| 1 | 2.4711 | 75 | 185.329 |
| 2 | 4.9421 | 100 | 247.1054 |
| 3 | 7.4132 | 200 | 494.2108 |
| 4 | 9.8842 | 250 | 617.7635 |
| 5 | 12.3553 | 500 | 1,235.5269 |
| 10 | 24.7105 | 1,000 | 2,471.0538 |
| 15 | 37.0658 |
Hectares to Acres FAQ
How many acres is 2 ha?
2 hectares is 4.9421 acres: 2 ha ÷ 0.40468564224 = 4.9421 ac.
How do I convert hectares to acres?
Divide the value in hectares by 0.40468564224 — the same as multiplying by about 2.47105. For example, 50 ha ÷ 0.40468564224 = 123.5527 ac. To convert back, multiply the value in acres by 0.40468564224 — or use the Acres to Hectares converter.
How many hectares are in one acre?
One acre is 0.4047 hectares, because 1 ac × 0.40468564224 = 0.4047 ha.
What is 50 hectares in acres?
How many acres is a square kilometer?
A square kilometer is 100 hectares, and 100 ha = 247.1054 ac.