Acres to Square Miles Calculator

Formula

To convert Acres to Square Miles:

\[ SM = \frac{A}{640} \]

Where:

\(SM\) is the area in square miles
\(A\) is the area in acres

What is an Acre?

An acre is a unit of area commonly used in the United States and the United Kingdom. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 1/640 of a square mile, about 40% of a hectare, or 4,840 square yards.

Example Calculation 1

Let's assume the following value:

Area in Acres (\(A\)) = 1280 acres

Using the formula:

\[ SM = \frac{1280}{640} = 2 \]

The area is 2 square miles.

Example Calculation 2

Let's assume the following value:

Area in Acres (\(A\)) = 320 acres

Using the formula:

\[ SM = \frac{320}{640} = 0.5 \]

The area is 0.5 square miles.