Square Inches to Square Meters Conversion. 1 Sq. Inch = 0.00064516 Sq. Sq. inch is an imperial, US customary area unit. The abbreviations are sq in and in2. Sq. meter is an area unit in metric system and used widely in measuring the small lands, floor plans etc. 1 square meter equals to 10.7639104 square feet. The abbreviations are m2 or sq m.