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Mil Converters

Convert mils (thou, thousandths of an inch) to inches, millimeters, micrometers and feet.

What this tool does

Convert mils (thou, thousandths of an inch) to inches, millimeters, micrometers and feet. Type an amount in thou (mils), choose the units, and the tool converts it to inches. It offers 7 length units and also shows the same amount in the others.

Inputs

  • Value: A number.
  • From: Choose one: Thou (mil), Inch, Millimeter, Micrometer, Centimeter, Foot, Nanometer. Starts as Thou (mil).
  • To: Choose one of the same 7 units as "From". Starts as Inch.

How to use

  1. Enter the amount you want to convert.
  2. Choose the unit to convert from and the unit to convert to.
  3. Read the result: the converted amount and the same amount in the other units. It appears once every required field has a valid value.

Worked examples

Conversions from thou (mils) to inches:

  • 1 thou = 0.001 in
  • 5 thou = 0.005 in
  • 10 thou = 0.01 in
  • 50 thou = 0.05 in
  • 100 thou = 0.1 in

Multiply the number of thou (mils) by 0.001 to get inches. Both units are exact definitions, so 0.001 is the exact factor: 1 thou = 0.001 in.

Sources: Thou (mil): exact by definition. Inch: International yard and pound agreement, 1959.

Limitations

  • Converts the unit of a length only. It does not work out a length from other measurements.
  • Uses the international inch, which is exactly 25.4 millimeters.

FAQs

Q: How many inches are in one thou (mil)?
A: One thou (mil) is 0.001 in. Enter any value and the converter scales it for you.
Q: How do I convert inches to thou (mils)?
A: Choose inch in the From box and thou (mil) in the To box. One inch is 1000 thou.
Q: What is a mil?
A: A mil, also called a thou, is one thousandth of an inch, which is 0.0254 millimeters. It is used for coating, film and wire thickness. It is not the angular mil used in rifle scopes.

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