Convert Square Millimeter (mm²) to Square Inch (in²)
To convert Square Millimeter to Square Inch, multiply the value by 0.00155. For example, 1 Square Millimeter = 0.00155 in² and 10 Square Millimeter = 0.0155 in². Both Square Millimeter and Square Inch are units of Area. Enter any value above for an instant, accurate result.
One Square Millimeter equals 0.00155 in².
Use the formula: in² = mm² × 0.00155.