The “are” is a unit of area primarily used in land measurement, notably in countries employing the metric system. Introduced in France in 1795, it represents 100 square meters, making it a practical unit for comparing parcels of land. Interestingly, it’s the base unit for hectares, with one hectare equating to 100 ares or 10,000 square meters. While the are has been largely overshadowed by hectares in commercial and agricultural contexts, it remains a vital unit in some regions for surveying smaller plots. The persistence of the “are” in certain legal and cultural settings highlights how historical units can remain relevant despite broader shifts towards newer measurement systems.
The square mile, a unit of area unique to imperial and U.S. customary systems, is often associated with vast expanses of land, particularly in regions like the United States and Canada. Historically used to map territories and cities, the square mile encompasses an area equivalent to 640 acres. One particularly fascinating application of the square mile is in city planning: Manhattan, one of the world’s most densely populated areas, covers about 22.7 square miles yet houses over a million residents!
Another interesting aspect is the “square mile of influence”: cities like London have financial districts, each around one square mile, that wield immense global economic power. These districts, often referred to simply as “The City,” play crucial roles in shaping world markets, showing how a single square mile can be the epicenter of international financial activity.
| Ares | Square Miles |
|---|---|
0
a
|
0
mi²
|
1
a
|
3.86102e-5
mi²
|
2
a
|
7.72204e-5
mi²
|
3
a
|
0.000115831
mi²
|
4
a
|
0.000154441
mi²
|
5
a
|
0.000193051
mi²
|
6
a
|
0.000231661
mi²
|
7
a
|
0.000270271
mi²
|
8
a
|
0.000308881
mi²
|
9
a
|
0.000347492
mi²
|
10
a
|
0.000386102
mi²
|
11
a
|
0.000424712
mi²
|
12
a
|
0.000463322
mi²
|
13
a
|
0.000501932
mi²
|
14
a
|
0.000540542
mi²
|
15
a
|
0.000579153
mi²
|
16
a
|
0.000617763
mi²
|
17
a
|
0.000656373
mi²
|
18
a
|
0.000694983
mi²
|
19
a
|
0.000733593
mi²
|
20
a
|
0.000772204
mi²
|
21
a
|
0.000810814
mi²
|
22
a
|
0.000849424
mi²
|
23
a
|
0.000888034
mi²
|
24
a
|
0.000926644
mi²
|
25
a
|
0.000965254
mi²
|
26
a
|
0.00100386
mi²
|
27
a
|
0.00104247
mi²
|
28
a
|
0.00108108
mi²
|
29
a
|
0.0011197
mi²
|
30
a
|
0.00115831
mi²
|
31
a
|
0.00119692
mi²
|
32
a
|
0.00123553
mi²
|
33
a
|
0.00127414
mi²
|
34
a
|
0.00131275
mi²
|
35
a
|
0.00135136
mi²
|
36
a
|
0.00138997
mi²
|
37
a
|
0.00142858
mi²
|
38
a
|
0.00146719
mi²
|
39
a
|
0.0015058
mi²
|
40
a
|
0.00154441
mi²
|
41
a
|
0.00158302
mi²
|
42
a
|
0.00162163
mi²
|
43
a
|
0.00166024
mi²
|
44
a
|
0.00169885
mi²
|
45
a
|
0.00173746
mi²
|
46
a
|
0.00177607
mi²
|
47
a
|
0.00181468
mi²
|
48
a
|
0.00185329
mi²
|
49
a
|
0.0018919
mi²
|
50
a
|
0.00193051
mi²
|
51
a
|
0.00196912
mi²
|
52
a
|
0.00200773
mi²
|
53
a
|
0.00204634
mi²
|
54
a
|
0.00208495
mi²
|
55
a
|
0.00212356
mi²
|
56
a
|
0.00216217
mi²
|
57
a
|
0.00220078
mi²
|
58
a
|
0.00223939
mi²
|
59
a
|
0.002278
mi²
|
60
a
|
0.00231661
mi²
|
61
a
|
0.00235522
mi²
|
62
a
|
0.00239383
mi²
|
63
a
|
0.00243244
mi²
|
64
a
|
0.00247105
mi²
|
65
a
|
0.00250966
mi²
|
66
a
|
0.00254827
mi²
|
67
a
|
0.00258688
mi²
|
68
a
|
0.00262549
mi²
|
69
a
|
0.0026641
mi²
|
70
a
|
0.00270271
mi²
|
71
a
|
0.00274132
mi²
|
72
a
|
0.00277993
mi²
|
73
a
|
0.00281854
mi²
|
74
a
|
0.00285715
mi²
|
75
a
|
0.00289576
mi²
|
76
a
|
0.00293437
mi²
|
77
a
|
0.00297298
mi²
|
78
a
|
0.00301159
mi²
|
79
a
|
0.0030502
mi²
|
80
a
|
0.00308881
mi²
|
81
a
|
0.00312742
mi²
|
82
a
|
0.00316603
mi²
|
83
a
|
0.00320464
mi²
|
84
a
|
0.00324325
mi²
|
85
a
|
0.00328187
mi²
|
86
a
|
0.00332048
mi²
|
87
a
|
0.00335909
mi²
|
88
a
|
0.0033977
mi²
|
89
a
|
0.00343631
mi²
|
90
a
|
0.00347492
mi²
|
91
a
|
0.00351353
mi²
|
92
a
|
0.00355214
mi²
|
93
a
|
0.00359075
mi²
|
94
a
|
0.00362936
mi²
|
95
a
|
0.00366797
mi²
|
96
a
|
0.00370658
mi²
|
97
a
|
0.00374519
mi²
|
98
a
|
0.0037838
mi²
|
99
a
|
0.00382241
mi²
|
100
a
|
0.00386102
mi²
|
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