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Square inch is an imperial and US customary area unit and equals to 0.00064516 sq. meters, 0.00694 sq. feet and 6.4516 sq. centimeters. The abbreviation is in 2 . Square meter is an area unit in metric system and equals to 1550 sq. inches and 10.7639104 sq. feet.
Square inches to square millimeters conversion table shows the most common values for your quick reference. Also, you may use the converter below to convert any other values. 1 Sq. Inch = 645.16 Sq. Sq. millimeter is an area unit in metric system and used rarely. Commonly spelled as square millimetre in many countries. The abbreviations are mm2 or sq mm. Sq. inch is an imperial, US customary area unit. The abbreviations are sq in and in2. For other area unit conversions, please go to Area Conversion.