Square Inch to Square Millimeter converter (in2 to mm2)

Conversion Formula

1 in2 = 645.16 mm2

Step-by-Step Explanation

1. Understand the base relationship:
   1 Square Inch = 0.00064516 m²
   1 Square Millimeter = 1.0E-6 m²
2. Establish the conversion factor:
   1 in2 = (0.00064516 m²) / (1.0E-6 m²/mm2) = 645.16 mm2
3. Apply the conversion:
   Multiply the value in in2 by 645.16 to get the equivalent in mm2

Example Conversion

Convert 5 in2 to mm2:

5 in2 × 645.16 = 3225.8 mm2