Inches → MM

0.25 inches to mm

0.25 inches equals 6.35 millimeters.

Millimeters

6.35 mm

Centimeters

0.635 cm

Meters

0.00635 m

Feet

0.0208 ft

Inches (in)

Millimeters (mm)

6.35

1 in = 25.4 mm · tolerance ±0.0001

Nearby values

0.24″0.23″0.27″0.22″0.2″0.3″0.19″0.31″0.1875″0.3125″

Precision

0.25

Inches

6.3 mm · max 100

Ref · 25.4 mm/in

Drag to set

Formula

mm = inches × 25.4
mm = 0.25 × 25.4 = 6.35

Why 0.25 in = 6.35 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.