An are is 100 m², the metric land unit from which the hectare (100 ares) takes its name. One acre is about 40.47 ares.
How to use the Acre to Are Converter
- Type the number of acres into the Acres field. Decimals such as 0.5 are fine.
- Read the answer in Ares. It updates as you type, with no button to press. The same amount is also shown in ha, m², ft².
- To go from ares back to acres, type into the Ares field instead. Every field also has a unit menu with all 16 area units, for example m², km², cm², mm², ha, ft², in², yd², mi², cent, gaj².
Results update as you type, and everything is calculated in your browser.
How it works
Both units measure area, so they are always in the same ratio: one acre equals 40.468564 ares. The calculator multiplies the number of acres you type by 40.468564 to give ares, and when you type into the ares field it divides by the same factor to give acres. Because the ratio never changes, doubling the acres always doubles the ares, for example 2 acre is 80.937128 a.
How to convert acres to ares
- Write down the value in acres, for example 1 acre.
- Multiply by the conversion factor 40.468564 (because 1 acre = 40.468564 a).
- 1 × 40.468564 = 40.468564 a.
- To go back from ares to acres, divide by 40.468564, or multiply by 0.024710538.
acre to a conversion table
| Acres | Ares | Ares | Acres |
|---|---|---|---|
| 0.25 acre | 10.117141 a | 1 a | 0.024710538 acre |
| 0.5 acre | 20.234282 a | 2 a | 0.049421076 acre |
| 1 acre | 40.468564 a | 5 a | 0.12355269 acre |
| 2 acre | 80.937128 a | 10 a | 0.24710538 acre |
| 5 acre | 202.34282 a | 20 a | 0.49421076 acre |
| 10 acre | 404.68564 a | 50 a | 1.2355269 acre |
| 50 acre | 2,023.4282 a | 100 a | 2.4710538 acre |
| 100 acre | 4,046.8564 a | 1,000 a | 24.710538 acre |
Area units explained
- Acre (acre)
- An acre is exactly 43,560 square feet, about 4,047 m². Historically it was the land a team of oxen could plough in a day. It remains the land unit in the U.S. and UK.
- Are (a)
- An are is 100 m², a square 10 m on each side. It is the base of the hectare (100 ares) and is still used for small plots in parts of Europe and South Asia.
Quick mental conversion
For a fast estimate, multiply acres by about 40 to get ares; the error is about 1.2%. Use the calculator above when you need the exact figure.
Formula
1 acre = 40.468564 a
1 a = 0.024710538 acres
a = acre × 40.468564
Worked example
Inputs: Acres: 1 acre.
Results: Ares = 40.46856422 a; Hectares = 0.40468564 ha; Square metres = 4,046.8564224 m²; Square feet = 43,560 ft².
Frequently asked questions
How many ares in an acre?
About 40.47 a.
How many ares in a hectare?
100.
How do I convert acres to ares?
Multiply the number of acres by 40.468564. For example, 1 acre × 40.468564 = 40.468564 a.
How do I convert ares back to acres?
Divide by 40.468564 (or multiply by 0.024710538), or simply type the value into the ares field above.
What is 10 acres in ares?
10 acres = 404.68564 a.
What is 100 acres in ares?
100 acres = 4,046.8564 a.
Is the acres to ares conversion exact?
Yes. Both units have exact official definitions (NIST and the SI), so the factor 40.468564 is exact to every digit shown, so the only difference you may see is rounding in the last displayed digit.