Length conversion

Millimeters to Inches

Useful for hardware, machining, 3D printing, and technical drawings where small metric dimensions need inch values.

Millimeters

1 mm

Inches

0.0393700787402 in

in = mm ÷ 25.4

The formula

How to convert millimeters to inches

Apply in = mm ÷ 25.4. For example, 1 mm equals 0.0393700787402 in.

Precision

Accurate constants, readable results

OmniUnit calculates with the full stored conversion factor, then displays up to 12 significant digits.

Common millimeters conversions

MillimetersInches
1 mm0.0393700787402 in
2 mm0.0787401574803 in
5 mm0.196850393701 in
10 mm0.393700787402 in
25 mm0.984251968504 in
100 mm3.93700787402 in

Related length conversions

Meters to Feetm → ft Feet to Metersft → m Inches to Centimetersin → cm Centimeters to Inchescm → in Miles to Kilometersmi → km