How many acres in 1 square miles?
The answer is 640.

We assume you are converting between **acre** and **square mile**.

You can view more details on each measurement unit:

acres or
square miles

The SI derived unit for **area** is the square meter.

1 square meter is equal to 0.00024710538146717 acres, or 3.8610215854245E-7 square miles.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between acres and square miles.

Type in your own numbers in the form to convert the units!

1 acres to square miles = 0.00156 square miles

10 acres to square miles = 0.01563 square miles

50 acres to square miles = 0.07813 square miles

100 acres to square miles = 0.15625 square miles

200 acres to square miles = 0.3125 square miles

500 acres to square miles = 0.78125 square miles

1000 acres to square miles = 1.5625 square miles

You can do the reverse unit conversion from square miles to acres, or enter any two units below:

An acre is a measure of land area in Imperial units or U.S. customary units. It is equal to 43 560 square feet, 4840 square yards, or 160 square rods. The precise meaning of this depends on the exact definition adopted for a foot: the international acre is 4 046.856 422 4 mē (for the UK, see). For measurements based specifically on the US survey foot the US survey acre is ca. 4 046.872 610 mē.

A square mile is defined as the area of a square with sides one mile in length.

The definition of a mile is as follows:

A mile is any of several units of distance, or, in physics terminology, of length. Today, one mile is mainly equal to about 1609 m on land and 1852 m at sea and in the air, but see below for the details. The abbreviation for mile is 'mi'. There are more specific definitions of 'mile' such as the metric mile, statute mile, nautical mile, and survey mile. On this site, we assume that if you only specify 'mile' you want the statute mile.

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