Inches to millimeters

3/8" = 10.16 mm

Millimeters
10.16
mm
Fraction
13/32"
Feet & inches
0.4"
Formula
0.4 × 25.4
051015202530354045505560657075808590951000"1"2"3"mmin

Tip: click or drag on the ruler to set the value.

How to convert

Multiply the inch value by 25.4 to get millimeters.

0.4 in × 25.4 = 10.16 mm

Quick facts

  • Millimeters10.16 mm
  • Centimeters1.016 cm
  • Meters0.01016 m
  • As fraction13/32"