Mil to mm Conversion Calculator

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One mil equals one-thousandth of an inch (0.001 in). Common in plastic film, paint coatings and PCB specifications.
mil
How many decimal places to display in the result.
Result in millimeters
0.254mm

Equivalent length in millimeters

Equivalent in inches0.01in
Equivalent in micrometers254um
Millimeters (mm)0.254
Micrometers (um)254

10 mil = 0.254 mm (254 micrometers)

  • Often used for agricultural films, greenhouse covers, and medium-weight bags.
  • In inches, 10 mil is exactly 0.010000 in (mils are thousandths of an inch by definition).
  • The conversion factor 0.0254 is exact: it follows from the internationally agreed definition of the inch.

Next stepNeed more unit options? Use the direction selector to switch to mm-to-mil mode, or see the reference table for common film and coating thicknesses.

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