Inches → MM

0.5 inches to mm

0.5 inches equals 12.7 millimeters.

Millimeters

12.7 mm

Centimeters

1.27 cm

Meters

0.0127 m

Feet

0.0417 ft

Inches (in)

Millimeters (mm)

12.7

1 in = 25.4 mm · tolerance ±0.0001

Nearby values

0.51″0.47″0.45″0.55″0.56″0.43″0.59″0.4″0.6″0.39″

Precision

0.5

Inches

12.7 mm · max 100

Ref · 25.4 mm/in

Drag to set

Formula

mm = inches × 25.4
mm = 0.5 × 25.4 = 12.7

Why 0.5 in = 12.7 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.