Acre mile conversion

Acre mile conversion DEFAULT

Acres to Square Miles Conversion

How to Convert Acres to Square Miles

conversion scale showing acres and equivalent square miles area values


To convert an acre measurement to a square mile measurement, divide the area by the conversion ratio.

Since one square mile is equal to 640 acres, you can use this simple formula to convert:

square miles = acres ÷ 640

The area in square miles is equal to the acres divided by 640.

For example,here's how to convert 500 acres to square miles using the formula above.

500 ac = (500 ÷ 640) = 0.78125 sq mi

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


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 for those unfamiliar with those units of measure.

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.

Try our acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

Square Miles

One square mile is equal to the area of a square with sides that are 1 mile long. One square mile is roughly equal to 2.59 square kilometers.

The square mile is a US customary and imperial unit of area. Square miles can be abbreviated as sq mi, and are also sometimes abbreviated as mi². For example, 1 square mile can be written as 1 sq mi or 1 mi².


Conversion square Mile to Acre

Conversion formula of square Mile to ac

The following information will give you different methods and formula(s) to convert square Mile in ac

Formulas in words

By multiplication

Number of square Mile multiply(x) by 640, equal(=): Number of Acre

By division

Number of square Mile divided(/) by 0.0015625, equal(=): Number of Acre

Calculation Example of square Mile in Acre

By multiplication

182 square Mile(s) * 640 = 116480 ac(s)

By division

182 square Mile(s) / 0.0015625 = 116480 ac(s)

Rounded conversion

Note that the results given in the boxes on the form are rounded to the ten thousandth unit nearby, so 4 decimals, or 4 decimal places.

Area unit

In geometry or mathematics, the area is used to obtain the surface of a figure or a shape. The basic form used in the calculation of the area is the square because its formula is simple to remember. In the case of the square, whose sides are all equal, the formula is: side (length) multiplied by another side (width). These sides lead to the representation of power or exponent 2 or 2.

Other units in square Mile

Convert other units:

Imperial system

The unit square Mile is an Anglo-Saxon measure from England but widely used in different fields and countries around the world. Fractions commonly used for calculating imperial units usually have an even number as the denominator. Here are the most used fractions: 1/2, 1/4, 1/8, 1/16, 1/32.

Table or conversion table square Mile to ac

You will find the first 100 square Miles converted to Acres

In () you have the number of Acres rounded to the closest unit.

square Mile(s)Acre(s)
1 square Mile(s)640 ac(s) (640)
2 square Mile(s)1280 ac(s) (1280)
3 square Mile(s)1920 ac(s) (1920)
4 square Mile(s)2560 ac(s) (2560)
5 square Mile(s)3200 ac(s) (3200)
6 square Mile(s)3840 ac(s) (3840)
7 square Mile(s)4480 ac(s) (4480)
8 square Mile(s)5120 ac(s) (5120)
9 square Mile(s)5760 ac(s) (5760)
10 square Mile(s)6400 ac(s) (6400)
11 square Mile(s)7040 ac(s) (7040)
12 square Mile(s)7680 ac(s) (7680)
13 square Mile(s)8320 ac(s) (8320)
14 square Mile(s)8960 ac(s) (8960)
15 square Mile(s)9600 ac(s) (9600)
16 square Mile(s)10240 ac(s) (10240)
17 square Mile(s)10880 ac(s) (10880)
18 square Mile(s)11520 ac(s) (11520)
19 square Mile(s)12160 ac(s) (12160)
20 square Mile(s)12800 ac(s) (12800)
21 square Mile(s)13440 ac(s) (13440)
22 square Mile(s)14080 ac(s) (14080)
23 square Mile(s)14720 ac(s) (14720)
24 square Mile(s)15360 ac(s) (15360)
25 square Mile(s)16000 ac(s) (16000)
26 square Mile(s)16640 ac(s) (16640)
27 square Mile(s)17280 ac(s) (17280)
28 square Mile(s)17920 ac(s) (17920)
29 square Mile(s)18560 ac(s) (18560)
30 square Mile(s)19200 ac(s) (19200)
31 square Mile(s)19840 ac(s) (19840)
32 square Mile(s)20480 ac(s) (20480)
33 square Mile(s)21120 ac(s) (21120)
34 square Mile(s)21760 ac(s) (21760)
35 square Mile(s)22400 ac(s) (22400)
36 square Mile(s)23040 ac(s) (23040)
37 square Mile(s)23680 ac(s) (23680)
38 square Mile(s)24320 ac(s) (24320)
39 square Mile(s)24960 ac(s) (24960)
40 square Mile(s)25600 ac(s) (25600)
41 square Mile(s)26240 ac(s) (26240)
42 square Mile(s)26880 ac(s) (26880)
43 square Mile(s)27520 ac(s) (27520)
44 square Mile(s)28160 ac(s) (28160)
45 square Mile(s)28800 ac(s) (28800)
46 square Mile(s)29440 ac(s) (29440)
47 square Mile(s)30080 ac(s) (30080)
48 square Mile(s)30720 ac(s) (30720)
49 square Mile(s)31360 ac(s) (31360)
50 square Mile(s)32000 ac(s) (32000)
51 square Mile(s)32640 ac(s) (32640)
52 square Mile(s)33280 ac(s) (33280)
53 square Mile(s)33920 ac(s) (33920)
54 square Mile(s)34560 ac(s) (34560)
55 square Mile(s)35200 ac(s) (35200)
56 square Mile(s)35840 ac(s) (35840)
57 square Mile(s)36480 ac(s) (36480)
58 square Mile(s)37120 ac(s) (37120)
59 square Mile(s)37760 ac(s) (37760)
60 square Mile(s)38400 ac(s) (38400)
61 square Mile(s)39040 ac(s) (39040)
62 square Mile(s)39680 ac(s) (39680)
63 square Mile(s)40320 ac(s) (40320)
64 square Mile(s)40960 ac(s) (40960)
65 square Mile(s)41600 ac(s) (41600)
66 square Mile(s)42240 ac(s) (42240)
67 square Mile(s)42880 ac(s) (42880)
68 square Mile(s)43520 ac(s) (43520)
69 square Mile(s)44160 ac(s) (44160)
70 square Mile(s)44800 ac(s) (44800)
71 square Mile(s)45440 ac(s) (45440)
72 square Mile(s)46080 ac(s) (46080)
73 square Mile(s)46720 ac(s) (46720)
74 square Mile(s)47360 ac(s) (47360)
75 square Mile(s)48000 ac(s) (48000)
76 square Mile(s)48640 ac(s) (48640)
77 square Mile(s)49280 ac(s) (49280)
78 square Mile(s)49920 ac(s) (49920)
79 square Mile(s)50560 ac(s) (50560)
80 square Mile(s)51200 ac(s) (51200)
81 square Mile(s)51840 ac(s) (51840)
82 square Mile(s)52480 ac(s) (52480)
83 square Mile(s)53120 ac(s) (53120)
84 square Mile(s)53760 ac(s) (53760)
85 square Mile(s)54400 ac(s) (54400)
86 square Mile(s)55040 ac(s) (55040)
87 square Mile(s)55680 ac(s) (55680)
88 square Mile(s)56320 ac(s) (56320)
89 square Mile(s)56960 ac(s) (56960)
90 square Mile(s)57600 ac(s) (57600)
91 square Mile(s)58240 ac(s) (58240)
92 square Mile(s)58880 ac(s) (58880)
93 square Mile(s)59520 ac(s) (59520)
94 square Mile(s)60160 ac(s) (60160)
95 square Mile(s)60800 ac(s) (60800)
96 square Mile(s)61440 ac(s) (61440)
97 square Mile(s)62080 ac(s) (62080)
98 square Mile(s)62720 ac(s) (62720)
99 square Mile(s)63360 ac(s) (63360)
100 square Mile(s)64000 ac(s) (64000)
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Square Miles and Acres Converter

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Use this calculator to convert square miles (mi²) to acres (ac) and acres to square miles. This converter is part of the full area converter tool.

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Disclaimer: Whilst every effort has been made in building this calculator, we are not to be held liable for any damages or monetary losses arising out of or in connection with the use of it. This tool is here purely as a service to you, please use it at your own risk. Full disclaimer. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate calculations.

Acres to Square Miles Conversions

AcresSquare Miles
1 acre0.00156 square miles
2 acres0.00313 square miles
3 acres0.00469 square miles
4 acres0.00625 square miles
5 acres0.00781 square miles
6 acres0.00938 square miles
7 acres0.01094 square miles
8 acres0.0125 square miles
9 acres0.01406 square miles
10 acres0.01563 square miles
11 acres0.01719 square miles
12 acres0.01875 square miles
13 acres0.02031 square miles
14 acres0.02188 square miles
15 acres0.02344 square miles
16 acres0.025 square miles
17 acres0.02656 square miles
18 acres0.02813 square miles
19 acres0.02969 square miles
20 acres0.03125 square miles
Figures rounded to a maximum of 5 decimal places (7 with smaller numbers).

How many square miles are there in 1 acre?

There are 0.0015625 square miles in 1 acre. To convert from acres to square miles, multiply your figure by 0.0015625 (or divide by 640) .

Square Miles to Acres Conversions

Square MilesAcres
1 square mile640 acres
2 square miles1280 acres
3 square miles1920 acres
4 square miles2560 acres
5 square miles3200 acres
6 square miles3840 acres
7 square miles4480 acres
8 square miles5120 acres
9 square miles5760 acres
10 square miles6400 acres
11 square miles7040 acres
12 square miles7680 acres
13 square miles8320 acres
14 square miles8960 acres
15 square miles9600 acres
16 square miles10240 acres
17 square miles10880 acres
18 square miles11520 acres
19 square miles12160 acres
20 square miles12800 acres
Figures rounded to a maximum of 5 decimal places (7 with smaller numbers).

How many acres are there in 1 square mile?

There are 640 acres in 1 square mile. To convert from square miles to acres, multiply your figure by 640 (or divide by 0.0015625) .

What is an acre?

The acre is a unit of land commonly employed within North America and the Caribbean. It is equal to 4,047 square metres or 43,560 square feet. This measurement is roughly equivalent to 40 per cent of a hectare. Interestingly enough, the acre can trace its roots back to mediaeval times. It was defined as the area that could be ploughed in a single day with the help of an ox. One acre is approximately 76 per cent the size of a football field. Many suburban lots are between one-quarter and one-fifth of an acre in size. You can find out more about acres in the article, how big is an acre?

What is a square mile?

Used within the United States and many other parts of the world, the square mile is one of the most common forms of measuring the area of land. It is defined as a square whose sides are each equivalent to one mile in length. One square mile is the same size as 2.59 square kilometers. There are 640 acres found within one square mile. One acre is somewhat approximated to the size of a football pitch. Aerial mapping, satellite imagery and global positioning systems will often employ square miles.

Other individual area converters

Ares and Acres, Cents and Acres, Hectares and Acres, Square Feet and Acres, Square Kilometers and Acres, Square Meters and Acres, Square Miles and Acres, Square Miles and Square Feet, Square Miles and Square Kilometers, Square Rods and Acres, Square Yards and Acres,

How many acres in a mile?

Acres to Square Miles

Square Miles to Acres (Swap Units)



Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Note: For a pure decimal result please select 'decimal' from the options above the result.

Show formula

Acres to Square Miles formula

mi² =

ac * 0.0015625




Show workingShow result in exponential format


A unit of area (4840 square yards) used in English-speaking countries


Acres to Square Miles formula

mi² =

ac * 0.0015625




Square Miles

A measurement of area equal to one mile length by one mile width making an area of 640 acres


Acres to Square Miles table

AcresSquare Miles
AcresSquare Miles
AcresSquare Miles

Conversion acre mile

Convert acres to square miles

Home / Area Conversion / Convert acres to square miles

Please provide values below to convert acre [ac] to square mile [mi^2], or vice versa.


Definition: An acre (symbol: ac) is a unit of land area used in the imperial and US customary systems. It is defined as the area of 1 chain (66 feet) by 1 furlong (660 feet), which is exactly equal to 1/640 of a square mile, 43,560 square feet, or exactly 4046.8564224 square meters.

History/origin: In the Middle Ages, the acre was defined as the area that a yoke (pair) of oxen could typically plow within one day, using a wooden plow. Before the metric system was adopted, many countries used their own versions of the acre. The most commonly used acre today, the international acre, is based on the international yard, which was defined in 1959.

Current use: Acres are used in countries including the United States, the UK, Ghana, India, Canada, and others. The United States (US) uses both international as well as US survey acres (~4047 square meters), which vary based on which type of yard is used in the measurement. However, area measurements are typically not accurate enough for the difference between the two acre measurements to be detectable.

Square mile

Definition: The square mile (symbol: sq mi or mi2) is a unit of area in the imperial and United States customary (UCS) systems of units. It is defined as the area of a square with side lengths of one statute mile (5,280 feet). A square mile is a large area that is equal to 27,878,400 square feet, 3,097,600 square yards, and 640 acres.

History/origin: Area is commonly represented in the form of a square with sides of a specific unit of length, written as "square" followed by the chosen unit of length. The square mile is one of many such units and is derived from the area of a square with sides of one mile.

Current use: Square miles are used when the measurement involves large scales such as country sizes. It can be used when referencing population studies, such as a measurement of total population per square mile. As an imperial and USC unit, it is most commonly used in countries that use these systems of measurement. In countries that have adopted the International System of Units, the square meter (and its subsequent multiples and submultiples) is the preferred system of measurement.

Acre to Square Mile Conversion Table

Acre [ac]Square Mile [mi^2]
0.01 ac1.5625E-5 mi^2
0.1 ac0.00015625 mi^2
1 ac0.0015625 mi^2
2 ac0.003125 mi^2
3 ac0.0046875 mi^2
5 ac0.0078125 mi^2
10 ac0.015625 mi^2
20 ac0.03125 mi^2
50 ac0.078125 mi^2
100 ac0.15625 mi^2
1000 ac1.5625 mi^2

How to Convert Acre to Square Mile

1 ac = 0.0015625 mi^2
1 mi^2 = 640 ac

Example: convert 15 ac to mi^2:
15 ac = 15 × 0.0015625 mi^2 = 0.0234375 mi^2

Popular Area Unit Conversions

Convert Acre to Other Area Units

How to convert Acres to Square Miles

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