Acres to Square Miles

Convert acres (ac) to square miles (mi²) with formulas, examples, and conversion tables.

ac
mi²
1 acres (ac) = 0.00156250138152 square miles (mi²)
Round to:
Step-by-Step Solution
1Write the conversion factor:
1 square mile = 639.999434129 acres
2Divide the value by the conversion factor:
1 ÷ 639.999434129 = 0.00156250138152
3Result:
1 acres (ac) = 0.00156250138152 square miles (mi²)
↔ Square Miles to Acres

How to Convert acres to square miles

To convert acres to square miles, divide the value by 639.999434129.

The Formula

square miles = acres ÷ 639.999434129

Key Fact

1 square mile = 639.999434129 acres

Tip: To convert square miles back to acres, multiply by 639.999434129.

acres to square miles Table

acressquare miles
1 ac0.00156250138152 mi²
2 ac0.00312500276304 mi²
5 ac0.00781250690761 mi²
10 ac0.0156250138152 mi²
20 ac0.0312500276304 mi²
25 ac0.039062534538 mi²
50 ac0.0781250690761 mi²
100 ac0.156250138152 mi²
250 ac0.39062534538 mi²
500 ac0.781250690761 mi²
1000 ac1.56250138152 mi²

1 acre in Other Units

Unit1 ac =
Acres to Square Kilometers0.00404686 km²
Acres to Hectares0.404686 ha
Acres to Square Meters4046.86 m²
Acres to Square Centimeters40468600 cm²
Acres to Square Millimeters4.04686e9 mm²
Acres to Square Miles0.00156250138152 mi²
Acres to Square Yards4840.00636267 yd²
Acres to Square Feet43560.057264 ft²
Acres to Square Inches6272645.54529 in²
Acres to Ares40.4686 a
Acres to Barns4.04686e31 b

Related Conversions

Square Meters to Square FeetSquare Feet to Square MetersAcres to HectaresHectares to AcresAcres to Square MetersSquare Meters to AcresSquare Kilometers to Square MilesSquare Miles to Square KilometersSquare Feet to Square InchesSquare Inches to Square Feet