đź“Ź mm Calculator
See how millimeter measurements translate across popular units.
Perfect for fabrication drawings, 3D printing, and DIY plans when you need to express millimeter dimensions in multiple unit systems.
Nanometers (nm)100,000,000
Angstroms (Ă…)1,000,000,000
Micrometers (µm)100,000
Centimeters (cm)10
Decimeters (dm)1
Meters (m)0.1
Kilometers (km)0.0001
Inches (in)3.937
Feet (ft)0.3281
Yards (yd)0.1094
Miles (mi)0.000062
Nautical Miles (NM)0.000054
Mils (thou)3,937.008
Astronomical Units (AU)0
Light Years (ly)0
How to Use This Calculator
Enter millimeters
Type the length measured in mm.
Review other units
The calculator displays equivalent lengths in centimeters, meters, inches, feet, yards, miles, and more.
Use results in plans
Copy the converted values into fabrication drawings or BOMs.
Formula
Centimeters = mm Ă· 10
Meters = mm Ă· 1,000
Inches = mm Ă· 25.4
Feet = Inches Ă· 12
Use the formula breakdown to confirm the calculation logic or perform the conversion manually if needed.
Full Description
Millimeters provide fine resolution for engineering and design, but collaborating teams often work in centimeters or inches. This calculator keeps everyone aligned by providing accurate conversions across systems.
Because it relies on the central length utility, the results stay consistent with every other converter in the app.
Frequently Asked Questions
Can I convert back to mm?
Yes—use the measurement converter or multiply alternative units by their conversion factors to return to mm.
Does it show micrometers?
Yes. The output list includes micrometers for microfabrication work.
Are fractional inches included?
Inches are displayed as decimals. Convert to fractions manually if required.
Why millimeters instead of centimeters?
Millimeters are standard in machining and 3D printing, where small tolerances matter.