Convert acres to square miles
Acres to square miles. Enter a value to convert, or use the acres to square miles chart further down the page.
1 acre equals 0.0015625 square miles. Going the other way, 1 square mile = 640 acres.
How to convert acres to square miles
To convert acres to square miles, multiply the acre value by 0.0015625. You can also divide by 640 to get the same answer.
mi² = ac × 0.0015625
Worked example
Convert 15 ac to square miles:
15 ac = 0.0234375 mi²
acres to square miles conversion chart
Use this acres to square miles table for quick reference without typing anything.
| acres (ac) | square miles (mi²) |
|---|---|
| 0.01 ac | 0.000015625 mi² |
| 0.1 ac | 0.00015625 mi² |
| 1 ac | 0.0015625 mi² |
| 2 ac | 0.003125 mi² |
| 3 ac | 0.0046875 mi² |
| 5 ac | 0.0078125 mi² |
| 10 ac | 0.015625 mi² |
| 20 ac | 0.03125 mi² |
| 50 ac | 0.078125 mi² |
| 100 ac | 0.15625 mi² |
| 1,000 ac | 1.5625 mi² |
What is a acre?
The acre is exactly 4,046.8564224 square meters, historically the area one ox team could plough in a day. It is the standard unit of land area in the US and UK.
What is a square mile?
A square mile is exactly 640 acres, or about 2.59 square kilometers. It is the unit used for US county and city areas.
Frequently asked questions
How many square miles are in an acre?
1 acres equals 0.0015625 square miles. Going the other way, 1 square miles is 640 acres.
How do you convert acres to square miles?
To convert acres to square miles, multiply the acre value by 0.0015625. You can also divide by 640 to get the same answer.
What is 10 acres in square miles?
10 acres equals 0.015625 square miles. The conversion chart on this page lists the other values people look up most often.
Related area conversions
Convert acres to other units
- square miles to acres
- acres to square meters
- acres to square feet
- acres to hectares
- acres to square kilometers
- acres to square yards
- acres to square inches
- acres to square centimeters
Convert other units to square miles
- square meters to square miles
- square feet to square miles
- hectares to square miles
- square kilometers to square miles
- square yards to square miles
- square inches to square miles
- square centimeters to square miles
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