Convert square miles to acres
Accurate tool to convert between mi² and ac
Area
Square miles
The square mile is an imperial unit of area.
Acres
The acre is a unit of land area used in the imperial and US customary systems.
Formula
To convert from mi2 to acres, multiply the area by 639.999.
mi2 (mi2)
Description
The square mile is an imperial unit of area.
History
Based on the mile.
Symbol Origin
Square of 'mile'.
Usage Context
Used for large geographical areas in the US and UK.
Main Usage
Did you know?
One square mile is equal to 640 acres.
acres (ac)
Description
The acre is a unit of land area used in the imperial and US customary systems.
History
Originally defined as the amount of land a yoke of oxen could plow in one day.
Symbol Origin
From Old English 'æcer', meaning open field.
Usage Context
Used for real estate and large plots of land in the US.
Main Usage
Did you know?
An acre is 43,560 square feet. It can be any shape, not just a square.
Quick Conversion Table
| mi2 (mi2) | acres (ac) |
|---|---|
| 1 | 639.999 |
| 2 | 1280 |
| 5 | 3200 |
| 10 | 6399.99 |
| 25 | 16000 |
| 50 | 32000 |
| 100 | 63999.9 |
| 500 | 320000 |
| 1000 | 639999 |
| 2500 | 1,600,000 |
| 5000 | 3,200,000 |
| 10000 | 6,399,990 |
Frequently Asked Questions
How to convert mi2 to acres?
To convert from mi2 to acres, multiply the area by 639.999.
How many acres in 1 mi2?
1 mi2 is equal to 639.999 acres.
What is a mi2?
The square mile is an imperial unit of area.
What is a acres?
The acre is a unit of land area used in the imperial and US customary systems.