Hectares to Acres Converter
Convert hectares to acres: 1 ha = 2.47105 ac. Exact factor, formula and a conversion chart.
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Result
- 1 ha
- 2.47105 ac
- 1 ac
- 0.404686 ha
How it's calculated
acres = hectares × 2.47105
To convert ha to ac, multiply by 2.47105.
ha in every unit
| square centimetre | 100,000,000 cm² |
| square metre | 10,000 m² |
| square kilometre | 0.01 km² |
| square inch | 15,500,031 in² |
| square foot | 107,639 ft² |
| square yard | 11,959.9 yd² |
| acre | 2.47105 ac |
| square mile | 0.00386102 mi² |
ha to ac conversion chart
| hectare (ha) | acre (ac) |
|---|---|
| 1 ha | 2.47105 ac |
| 2 ha | 4.94211 ac |
| 3 ha | 7.41316 ac |
| 4 ha | 9.88422 ac |
| 5 ha | 12.3553 ac |
| 6 ha | 14.8263 ac |
| 7 ha | 17.2974 ac |
| 8 ha | 19.7684 ac |
| 9 ha | 22.2395 ac |
| 10 ha | 24.7105 ac |
| 12 ha | 29.6526 ac |
| 15 ha | 37.0658 ac |
| 20 ha | 49.4211 ac |
| 25 ha | 61.7763 ac |
| 50 ha | 123.553 ac |
| 100 ha | 247.105 ac |
How many acres are in 1 hectare?
1 hectare = 2.47105 acres. To convert hectares to acres, multiply by 2.47105. For example, 10 ha = 24.7105 ac and 100 ha = 247.105 ac. Enter any value above for an exact result.
The Unit Converter changes a value from one unit to another across 11 kinds of measurement: length, weight, temperature, volume, area, speed, time, digital storage, energy, pressure and fuel economy. It covers metric units (centimetres, kilograms, litres), US and UK imperial units (inches, pounds, gallons) and everyday ones such as cups, stones, acres and kilowatt-hours.
Conversions use the official definitions — 1 inch is exactly 2.54 cm, 1 pound exactly 0.45359237 kg, 1 US gallon exactly 3.785411784 litres — and the page shows the factor, the formula, the value in every other unit and a chart of common values, so you can check or reuse the numbers.
When to use it
- Converting height and weight between metric and imperial (cm ↔ feet and inches, kg ↔ lbs).
- Cooking with recipes from another country (cups, tablespoons, ml, grams, ounces).
- Reading weather and oven temperatures in Celsius or Fahrenheit.
- Property sizes in square feet, square metres, acres and hectares.
- File sizes (MB ↔ GB), fuel economy (mpg ↔ L/100 km) and tyre pressure (psi ↔ bar).
Tips for better results
- US and UK gallons and pints differ by about 20% — check which one a recipe or car manual uses.
- Temperature is not a simple multiplication: use the formula shown (°F = °C × 9/5 + 32).
- Storage makers use 1 GB = 1,000 MB, while some operating systems show GiB (1,024 MiB) — both are listed.
How to use the Unit Converter
- Choose the measurement, such as length or temperature.
- Enter the value and pick the units to convert from and to.
- Read the result, the value in every other unit and the conversion chart below.
Frequently asked questions
How do I convert hectares to acres?
To convert hectares to acres, multiply by 2.47105. For example, 10 ha = 24.7105 ac.
How do I convert acres back to hectares?
Press the swap button between the units. 1 ac = 0.404686 ha.
Is the conversion exact?
Yes. It uses the official definitions of the units; results are only rounded to six significant digits for display.
Are the conversions exact?
Yes. Units are converted with their defined factors — for example 1 inch is exactly 2.54 cm and 1 pound is exactly 0.45359237 kg — and results are rounded to six significant digits only for display.
Are cups and gallons US or UK?
Cups, pints, quarts and gallons are US customary units unless marked UK. UK (imperial) gallons and pints are listed separately because they are about 20% larger.
How many centimetres are in an inch?
Exactly 2.54 cm. To convert inches to centimetres, multiply by 2.54; to convert centimetres to inches, divide by 2.54.
How do I convert kilograms to pounds?
Multiply by 2.20462 (1 kg = 2.20462 lb). To convert pounds to kilograms, multiply by 0.453592.