đź“Ź Millimeter Calculator
Translate millimeter lengths into multiple metric and imperial units.
Handy for fabrication drawings, 3D printing, and DIY plans that mix measurement systems.
Nanometers (nm)10,000,000
Angstroms (Ă…)100,000,000
Micrometers (µm)10,000
Centimeters (cm)1
Decimeters (dm)0.1
Meters (m)0.01
Kilometers (km)0.00001
Inches (in)0.394
Feet (ft)0.0328
Yards (yd)0.0109
Miles (mi)0.000006
Nautical Miles (NM)0.000005
Mils (thou)393.701
Astronomical Units (AU)0
Light Years (ly)0
How to Use This Calculator
Enter millimeters
Type the measurement in mm.
Review conversions
See equivalent lengths in centimeters, meters, inches, feet, yards, and more.
Apply results
Use the converted values in fabrication notes or when purchasing materials.
Formula
Centimeters = Millimeters Ă· 10
Meters = Millimeters Ă· 1,000
Inches = Millimeters 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 design work, but many stakeholders still expect inches or centimeters. This calculator ensures accurate conversions across both systems without manual math.
Because it references the centralized length conversion utilities, updates to the unit list automatically flow into this page.
Frequently Asked Questions
Can I convert back to millimeters?
Yes—use the measurement converter or divide inches by 0.03937 to return to mm.
Does it support micrometers?
Yes. The output includes micrometers (µm) since they are part of the length unit library.
Are fractional inches supported?
Inches are displayed as decimals. Convert to fractions as needed for your workflow.
Can I copy the results?
Yes. Highlight any value to copy and paste into your documentation.