Square Miles to Acre Converter

Convert Square Miles to Acres

Result

Quick Conversions

Auto

How to Convert Square Miles to Acres

To convert square miles to acres, you multiply the area in square miles by 640.

Formula

Acres = Square Miles × 640

or

ac = mi² × 640

Step-by-step process

  1. Take the measurement in square miles.
  2. Multiply it by 640.
  3. The result is the area in acres.

Examples

  • 1 mi² = 640 ac
  • 2 mi² = 1280 ac
  • 5 mi² = 3200 ac

When to Convert Square Miles to Acres

This conversion is commonly used in the United States and other countries that use the imperial system for large land areas.

Common Square Miles to Acres Conversions

Here is a table of common conversions:

Square Miles (mi²) Acres (ac)
1 640
2 1280
5 3200
10 6400

Frequently Asked Questions

How many acres are in a square mile?

There are 640 acres in a square mile.

How many square miles are in an acre?

There are 0.0015625 square miles in an acre.