Convert square miles to acres (sq mi to ac) and acres to square miles (ac to sq mi) Online Conversion Calculator - Converter

This calculator-converter provides conversion of square miles to acres (sq mi to ac) and backwards acres to square miles (ac to sq mi).

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Conversion Chart / Table
 square mile to acres Conversion Chart / Table: acres to square miles Conversion Chart / Table: sq mi = ac 1.0 = 640 2.0 = 1280 3.0 = 1920 4.0 = 2560 5.0 = 3200 6.0 = 3840 7.0 = 4480 8.0 = 5120 9.0 = 5760 square mile = acres 10 = 6400 20 = 12800 30 = 19200 40 = 25600 50 = 32000 100 = 64000 500 = 320000 1000 = 640000 5000 = 3200000 ac = sq mi 1.0 = 0.00156 2.0 = 0.00313 3.0 = 0.00469 4.0 = 0.00625 5.0 = 0.00781 6.0 = 0.00938 7.0 = 0.01094 8.0 = 0.01250 9.0 = 0.01406 acres = square miles 10 = 0.01563 20 = 0.03125 30 = 0.04688 40 = 0.06250 50 = 0.07813 100 = 0.15625 500 = 0.78125 1000 = 1.56250 5000 = 7.81250

The square mile (symbol or abbreviation: sq mi. or mi², plural form: square miles) is a unit of area used in several different systems, including Imperial units, English units and United States customary units. One square mile = 640 acres (ac.) = 2589988.110336 square meters (m2)= 2.589988110336 square kilometers = 27,878,400 square feet = 258.9988110336 hectares = 3,097,600 square yards = 4,014,489,600 square inches.