Convert Acres to Square Miles

Q: How many square miles are in a acre?

There are 0.0015625 square miles in one acre.

Q: How many acres are in a square mile?

There are 640 acres in one square mile.

1 acre = 0.0015625 square miles. Type any value below to convert in either direction — the calculation happens in your browser.

acres

square miles

Acres to Square Miles formula

Multiply the number of acres by 0.0015625 to get square miles.

square miles = acres × 0.0015625

To go the other way: divide the number of square miles by 0.0015625, or multiply by 640.

acres = square miles ÷ 0.0015625

Acres to Square Miles conversion table

Acres	Square Miles
1 ac	0.0015625 mi²
2 ac	0.003125 mi²
3 ac	0.0046875 mi²
4 ac	0.00625 mi²
5 ac	0.0078125 mi²
6 ac	0.009375 mi²
7 ac	0.0109375 mi²
8 ac	0.0125 mi²
9 ac	0.0140625 mi²
10 ac	0.015625 mi²
15 ac	0.0234375 mi²
20 ac	0.03125 mi²
25 ac	0.0390625 mi²
30 ac	0.046875 mi²
40 ac	0.0625 mi²
50 ac	0.078125 mi²
75 ac	0.1171875 mi²
100 ac	0.15625 mi²
250 ac	0.390625 mi²
500 ac	0.78125 mi²
1,000 ac	1.5625 mi²

Square Miles to Acres conversion table

Square Miles	Acres
1 mi²	640 ac
2 mi²	1,280 ac
3 mi²	1,920 ac
4 mi²	2,560 ac
5 mi²	3,200 ac
6 mi²	3,840 ac
7 mi²	4,480 ac
8 mi²	5,120 ac
9 mi²	5,760 ac
10 mi²	6,400 ac

About the acre

An acre is 43,560 square feet, about 4,047 square metres — roughly a US football field without the end zones.

About the square mile

A square mile is about 2.59 square kilometres and is used for US counties, states and land surveys.

Frequently asked questions

How many square miles are in a acre?

There are 0.0015625 square miles in one acre.

How many acres are in a square mile?

There are 640 acres in one square mile.

Is this conversion exact?

The ratio between the acre and the square mile is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.

What is 10 acres in square miles?

10 acres equals 0.015625 square miles.

Related area conversions

All area converters · All converters