Inches → MM
1.2 inches to mm
1.2 inches equals 30.48 millimeters.
Millimeters
30.48 mm
Centimeters
3.048 cm
Meters
0.03048 m
Feet
0.1 ft
in
30.48
mm1 in = 25.4 mm · tolerance ±0.0001
Formula
mm = inches × 25.4
mm = 1.2 × 25.4 = 30.48
Why 1.2 in = 30.48 mm
The international inch is defined as exactly 25.4 mm, so any inches-to-mm conversion is a clean multiplication with no rounding required at this precision.