Acres to Ares Conversion (ac to a)

Acres to Ares Converter

Enter the area in acres below to convert it to ares.

Result in Ares:

1 ac = 40.468564 a

How to Convert Acres to Ares

To convert a measurement in acres to a measurement in ares, multiply the area by the following conversion ratio: 40.468564 ares/acre.

Since one acre is equal to 40.468564 ares, you can use this simple formula to convert:

ares = acres × 40.468564

The area in ares is equal to the area in acres multiplied by 40.468564.

For example, here's how to convert 5 acres to ares using the formula above.

ares = (5 ac × 40.468564) = 202.342821 a

How Many Ares Are in an Acre?

There are 40.468564 ares in an acre, which is why we use this value in the formula above.

1 ac = 40.468564 a

Acres and ares are both units used to measure area. Keep reading to learn more about each unit of measure.

What Is an Acre?

One acre is defined as the area equal to a space that is one chain (66 ft) by one furlong (660 ft), or 10 square chains.^[1] That's equal to 43,560 square feet or 1/640 of a square mile for those unfamiliar with those units of measure.

illustration showing the size of an acre is a parcel of land that is 66 feet by 660 feet.

The acre is a US customary and imperial unit of area. Acres can be abbreviated as ac; for example, 1 acre can be written as 1 ac.

You can use an acreage calculator to measure the area of a plot of land in acres by locating the boundaries on a map.

Learn more about acres.

What Is an Are?

One are is equal to 100 square meters, or the area of a square with 10 meter sides.

The are is a non-SI metric unit for area. Ares can be abbreviated as a; for example, 1 are can be written as 1 a.

Learn more about ares.

Acre to Are Conversion Table

Table showing various acre measurements converted to ares.
Acres	Ares
1 ac	40.47 a
2 ac	80.94 a
3 ac	121.41 a
4 ac	161.87 a
5 ac	202.34 a
6 ac	242.81 a
7 ac	283.28 a
8 ac	323.75 a
9 ac	364.22 a
10 ac	404.69 a
11 ac	445.15 a
12 ac	485.62 a
13 ac	526.09 a
14 ac	566.56 a
15 ac	607.03 a
16 ac	647.5 a
17 ac	687.97 a
18 ac	728.43 a
19 ac	768.9 a
20 ac	809.37 a
21 ac	849.84 a
22 ac	890.31 a
23 ac	930.78 a
24 ac	971.25 a
25 ac	1,012 a
26 ac	1,052 a
27 ac	1,093 a
28 ac	1,133 a
29 ac	1,174 a
30 ac	1,214 a
31 ac	1,255 a
32 ac	1,295 a
33 ac	1,335 a
34 ac	1,376 a
35 ac	1,416 a
36 ac	1,457 a
37 ac	1,497 a
38 ac	1,538 a
39 ac	1,578 a
40 ac	1,619 a

Table showing various acre measurements converted to ares.

Acres

Ares

1 ac

40.47 a

2 ac

80.94 a

3 ac

121.41 a

4 ac

161.87 a

5 ac

202.34 a

6 ac

242.81 a

7 ac

283.28 a

8 ac

323.75 a

9 ac

364.22 a

10 ac

404.69 a

11 ac

445.15 a

12 ac

485.62 a

13 ac

526.09 a

14 ac

566.56 a

15 ac

607.03 a

16 ac

647.5 a

17 ac

687.97 a

18 ac

728.43 a

19 ac

768.9 a

20 ac

809.37 a

21 ac

849.84 a

22 ac

890.31 a

23 ac

930.78 a

24 ac

971.25 a

25 ac

1,012 a

26 ac

1,052 a

27 ac

1,093 a

28 ac

1,133 a

29 ac

1,174 a

30 ac

1,214 a

31 ac

1,255 a

32 ac

1,295 a

33 ac

1,335 a

34 ac

1,376 a

35 ac

1,416 a

36 ac

1,457 a

37 ac

1,497 a

38 ac

1,538 a

39 ac

1,578 a

40 ac

1,619 a

References

National Institute of Standards and Technology, Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices, Handbook 44 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.44-2019.pdf