Square Miles to Acres Conversion

How many acres in a square mile?

Square miles to acres (mi2 to ac) area units conversion factor is 640. To find out how many acres in square miles, multiply by the conversion factor or use the converter.

1 Square Mile = 640 Acres

There are 640 acres in a square mile, because an acre is defined as an area of 66 feet to 660 feet and equals to 66 * 660 = 43560 square feet and one mile is 5280 feet and one sq. mile equals to 5280 * 5280 = 27878400 square feet, that makes 27878400 / 43560 = 640 acres in a square mile.

For example, to find out how many acres there are in a square mile and a half, as a formula to convert from sq. miles to acres, multiply the sq. mile value by 640, that makes 1.5 mi2 * 640 = 960 acres in 1.5 sq. miles.

Square mile and acre are imperial and US customary area units and one square mile equals to 640 acres and 259 hectares. The abbreviations are "mi2" and "ac".

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Sq. Miles to Acres Conversion Table

Sq. Mile Acre Sq. Mile Acre Sq. Mile Acre Sq. Mile Acre
1 mi2 640 ac 26 mi2 16640 ac 51 mi2 32640 ac 76 mi2 48640 ac
2 mi2 1280 ac 27 mi2 17280 ac 52 mi2 33280 ac 77 mi2 49280 ac
3 mi2 1920 ac 28 mi2 17920 ac 53 mi2 33920 ac 78 mi2 49920 ac
4 mi2 2560 ac 29 mi2 18560 ac 54 mi2 34560 ac 79 mi2 50560 ac
5 mi2 3200 ac 30 mi2 19200 ac 55 mi2 35200 ac 80 mi2 51200 ac
6 mi2 3840 ac 31 mi2 19840 ac 56 mi2 35840 ac 81 mi2 51840 ac
7 mi2 4480 ac 32 mi2 20480 ac 57 mi2 36480 ac 82 mi2 52480 ac
8 mi2 5120 ac 33 mi2 21120 ac 58 mi2 37120 ac 83 mi2 53120 ac
9 mi2 5760 ac 34 mi2 21760 ac 59 mi2 37760 ac 84 mi2 53760 ac
10 mi2 6400 ac 35 mi2 22400 ac 60 mi2 38400 ac 85 mi2 54400 ac
11 mi2 7040 ac 36 mi2 23040 ac 61 mi2 39040 ac 86 mi2 55040 ac
12 mi2 7680 ac 37 mi2 23680 ac 62 mi2 39680 ac 87 mi2 55680 ac
13 mi2 8320 ac 38 mi2 24320 ac 63 mi2 40320 ac 88 mi2 56320 ac
14 mi2 8960 ac 39 mi2 24960 ac 64 mi2 40960 ac 89 mi2 56960 ac
15 mi2 9600 ac 40 mi2 25600 ac 65 mi2 41600 ac 90 mi2 57600 ac
16 mi2 10240 ac 41 mi2 26240 ac 66 mi2 42240 ac 100 mi2 64000 ac
17 mi2 10880 ac 42 mi2 26880 ac 67 mi2 42880 ac 125 mi2 80000 ac
18 mi2 11520 ac 43 mi2 27520 ac 68 mi2 43520 ac 150 mi2 96000 ac
19 mi2 12160 ac 44 mi2 28160 ac 69 mi2 44160 ac 175 mi2 112000 ac
20 mi2 12800 ac 45 mi2 28800 ac 70 mi2 44800 ac 200 mi2 128000 ac
21 mi2 13440 ac 46 mi2 29440 ac 71 mi2 45440 ac 250 mi2 160000 ac
22 mi2 14080 ac 47 mi2 30080 ac 72 mi2 46080 ac 300 mi2 192000 ac
23 mi2 14720 ac 48 mi2 30720 ac 73 mi2 46720 ac 500 mi2 320000 ac
24 mi2 15360 ac 49 mi2 31360 ac 74 mi2 47360 ac 750 mi2 480000 ac
25 mi2 16000 ac 50 mi2 32000 ac 75 mi2 48000 ac 1000 mi2 640000 ac

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