Convert Acres to Square Kilometers

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Acres

An acre is a unit of area equal to 1/640th of a square mile.

It is about the size of an American football field.

Square Kilometers

A square kilometer is a unit of area equal to a square that is one kilometer on a side.

It is equal to 1 million square meters, 100 hectares, about 247 acres, or about 0.386 square miles.

Acres to Square Kilometers Conversion Table inverse table
(some results are rounded)
acres sq km
1 0.004047
2 0.008094
3 0.01214
4 0.01619
5 0.02023
6 0.02428
7 0.02833
8 0.03237
9 0.03642
10 0.04047
11 0.04452
12 0.04856
13 0.05261
14 0.05666
15 0.0607
16 0.06475
17 0.0688
18 0.07284
19 0.07689
20 0.08094
21 0.08498
22 0.08903
23 0.09308
24 0.09712
25 0.1012
26 0.1052
acres sq km
27 0.1093
28 0.1133
29 0.1174
30 0.1214
31 0.1255
32 0.1295
33 0.1335
34 0.1376
35 0.1416
36 0.1457
37 0.1497
38 0.1538
39 0.1578
40 0.1619
41 0.1659
42 0.17
43 0.174
44 0.1781
45 0.1821
46 0.1862
47 0.1902
48 0.1942
49 0.1983
50 0.2023
51 0.2064
52 0.2104
acres sq km
53 0.2145
54 0.2185
55 0.2226
56 0.2266
57 0.2307
58 0.2347
59 0.2388
60 0.2428
61 0.2469
62 0.2509
63 0.255
64 0.259
65 0.263
66 0.2671
67 0.2711
68 0.2752
69 0.2792
70 0.2833
71 0.2873
72 0.2914
73 0.2954
74 0.2995
75 0.3035
76 0.3076
77 0.3116
78 0.3157
acres sq km
79 0.3197
80 0.3237
81 0.3278
82 0.3318
83 0.3359
84 0.3399
85 0.344
86 0.348
87 0.3521
88 0.3561
89 0.3602
90 0.3642
91 0.3683
92 0.3723
93 0.3764
94 0.3804
95 0.3845
96 0.3885
97 0.3925
98 0.3966
99 0.4006
100 0.4047
200 0.8094
300 1.2141
400 1.6187
500 2.0234
acres sq km
600 2.4281
700 2.8328
800 3.2375
900 3.6422
1,000 4.0469
2,000 8.0937
3,000 12.141
4,000 16.187
5,000 20.234
6,000 24.281
7,000 28.328
8,000 32.375
9,000 36.422
10,000 40.469
20,000 80.937
30,000 121.41
40,000 161.87
50,000 202.34
60,000 242.81
70,000 283.28
80,000 323.75
90,000 364.22
100,000 404.69