Square mile to Acre

Square meter (m²) is the base unit of area (A) in the International System of Units (SI).

Square mile

The square mile (mi²) is a unit of area equal to 4,014,489,600 square inches equal to 27878400 square feet equal to 3097600 square yards.

Acre

An acre is a unit of area, 1acre equal to 10 square chains equal to ​1/640 square mile equal to 43,560 square feet, and approximately equal to 4,047 m².

Acre to Square mile Formula

Divide the acre value by 640.000000
square mile = acre / 640.000000

Square mile to Acre Formula

Multiply the square mile value by 640.000000
acre = square mile x 640.000000

How many acre in a square mile?

One square mile (mi²) is equal to 640.000000 acre (ac)
1 square mile (mi²) = 640.000000 acre (ac)

How many square mile in a acre?

One acre (ac) is equal to 0.001563 square mile (mi²)
1 acre (ac) = 0.001563 square mile (mi²)