Acre to Hectare Converter
Enter the value that you want to convert acre (ac) to hectare (ha) or hectare to acre.Also written as AC to HA conversion.
1 acre = 0.4046856 hectare
Formula: hectare = acre value × 0.4046856
AC to HA — acre to hectare
10 acre = 4.04686 hectare
Popular Area Converters:
How Acre Relates to Hectare
Understanding the Acre
Acre (ac) is a unit of area measurement. 1 acre is equal to 0.4046856 hectare.
What is Hectare?
Hectare (ha) is a unit of area measurement. 1 hectare is equal to 2.4710538 acre.
Area Measurements Around the World
Area conversions are essential in real estate, agriculture, and urban planning. Americans buy land in acres and homes in square feet. Europeans use square meters and hectares. Indian real estate uses bigha, biswa, and square yards. Japanese property listings use tsubo. Agricultural subsidies across countries require converting between local customary units and standardized metric hectares.
acre to hectare metric conversion table
| 0.01 ac | = | 0.00405 ha |
| 0.1 ac | = | 0.04047 ha |
| 1 ac | = | 0.40469 ha |
| 2 ac | = | 0.80937 ha |
| 3 ac | = | 1.21406 ha |
| 4 ac | = | 1.61874 ha |
| 5 ac | = | 2.02343 ha |
| 6 ac | = | 2.42811 ha |
| 7 ac | = | 2.83280 ha |
| 8 ac | = | 3.23749 ha |
| 9 ac | = | 3.64217 ha |
| 10 ac | = | 4.04686 ha |
| 11 ac | = | 4.45154 ha |
| 12 ac | = | 4.85623 ha |
| 13 ac | = | 5.26091 ha |
| 14 ac | = | 5.66560 ha |
| 15 ac | = | 6.07028 ha |
| 16 ac | = | 6.47497 ha |
| 17 ac | = | 6.87966 ha |
| 18 ac | = | 7.28434 ha |
| 19 ac | = | 7.68903 ha |
| 20 ac | = | 8.09371 ha |
| 30 ac | = | 12.14057 ha |
| 40 ac | = | 16.18743 ha |
| 50 ac | = | 20.23428 ha |
| 60 ac | = | 24.28114 ha |
| 70 ac | = | 28.32799 ha |
| 80 ac | = | 32.37485 ha |
| 90 ac | = | 36.42171 ha |
| 100 ac | = | 40.46856 ha |
| 200 ac | = | 80.93713 ha |
| 300 ac | = | 121.40569 ha |
| 400 ac | = | 161.87426 ha |
| 500 ac | = | 202.34282 ha |
| 600 ac | = | 242.81139 ha |
| 700 ac | = | 283.27995 ha |
| 800 ac | = | 323.74851 ha |
| 900 ac | = | 364.21708 ha |
| 1000 ac | = | 404.68564 ha |
How to Convert AC to HA (Acre to Hectare)?
We can convert acre to hectare by using an example.
Example:
Convert 20 Acre to Hectare?
We know 1 Acre = 0.4046856 hectare; 1 Hectare = 2.4710538 acre.
20 acre = ___ha
20 × 0.4046856 = 8.09371 ha (we know 1 acre = 0.4046856 hectare)
Answer:
20 acre = 8.09371 hectare
Acres to Hectares: Bridging US and International Land Measurement
When dealing with international real estate, agricultural trade, or environmental reports, you will often need to convert between acres (used in the US, UK, and former British colonies) and hectares (used in most other countries and all scientific contexts). One acre equals 0.404686 hectares.
- Start with your land area in acres.
- Multiply the acre value by 0.404686.
- The result is the equivalent area in hectares.
- For a rough estimate, multiply acres by 0.4 (within 1.2% accuracy).
Common Acres to Hectares Conversions
Reference values for agriculture, forestry, and international land transactions:
| Acre | Hectare |
|---|---|
| 1 acre | 0.4047 ha |
| 2.5 acres | 1.012 ha |
| 5 acres | 2.023 ha |
| 10 acres | 4.047 ha |
| 40 acres | 16.187 ha |
| 100 acres | 40.469 ha |
| 160 acres | 64.750 ha |
| 640 acres | 259.0 ha |
Solved Examples: Acres to Hectares
Question 1: A vineyard in California covers 28 acres. Express its size in hectares for an international buyer.
Solution:
Area in hectares = acres × 0.404686
= 28 × 0.404686
= 11.331 hectares
Answer: The 28-acre vineyard is approximately 11.33 hectares.
Question 2: A conservation area is 450 acres. Convert to hectares for a UN environmental report.
Solution:
Area in hectares = acres × 0.404686
= 450 × 0.404686
= 182.109 hectares
Answer: 450 acres = 182.11 hectares of protected land.
Question 3: A family farm spans 85 acres. How many hectares is that?
Solution:
Area in hectares = acres × 0.404686
= 85 × 0.404686
= 34.398 hectares
Answer: 85 acres ≈ 34.4 hectares.
Practice: Acres to Hectares
Try solving these on your own to test your understanding:
- Convert 15 acres to hectares. (Answer: 6.07 ha)
- A ranch is 320 acres. How many hectares? (Answer: 129.5 ha)
- Express 2.5 acres in hectares. (Answer: 1.012 ha)
- A national forest section covers 1,000 acres. Convert to hectares. (Answer: 404.69 ha)
- A golf course is 150 acres. What is that in hectares? (Answer: 60.70 ha)
Where Acres and Hectares Are Used
Acres are the primary land measurement in the United States, United Kingdom, Myanmar, and several Caribbean nations. Hectares are the standard in virtually all other countries and are the mandatory unit for EU agricultural subsidies, UN reports, and international scientific publications. Australia officially switched from acres to hectares in 1970 as part of its metrication program.
Agriculture: Why Hectares Matter Globally
Global crop yield statistics are reported in tonnes per hectare (t/ha). If you read that wheat yields average 3.5 t/ha worldwide, converting to acres gives about 1.42 tonnes per acre or roughly 52 bushels per acre. Understanding this conversion is essential for comparing agricultural productivity across borders and evaluating international commodity reports.
Key Takeaways
- One acre = 0.404686 hectares.
- Quick ratio: 2.5 acres ≈ 1 hectare.
- Multiply acres by 0.4047 for a precise hectare conversion.
- Hectares are used for international agriculture and science; acres are US/UK standard.
- A 640-acre section (1 square mile) = approximately 259 hectares.
Acre to Hectare Conversion Formula
hectare = acre × 0.4046856
1 acre = 0.4046856 hectare
1 hectare = 2.4710538 acre
Reverse: acre = hectare × 2.4710538
Frequently Asked Questions
How many hectare are in 1 acre?
There are 0.4046856 hectare in 1 acre. To convert acre to hectare, multiply the value by 0.4046856.
How do I convert acre to hectare?
Multiply your acre value by 0.4046856 to get the equivalent in hectare. For example, 5 acre = 5 × 0.4046856 = 2.02343 hectare.
How do I convert hectare to acre?
Multiply your hectare value by 2.4710538 to get the equivalent in acre. Alternatively, divide by 0.4046856.
What is 10 acre in hectare?
10 acre is equal to 4.04686 hectare.
What is 100 acre in hectare?
100 acre is equal to 40.46856 hectare.