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Millimeters to Inches Converter

Convert millimeters to inches by typing a value: the answer appears as you type. One mm equals 0.0393701 in, so to go from millimeters to inches you divide by 25.4. A table of common values is included below.

Quick examples
mm
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Inches0.315 in
The same number of inches in millimeters
203.2 mm
Millimeters to inches table
Millimeters (mm)Inches (in)

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      Formula

      Inches = millimeters × 0.0393701
      1 mm = 0.0393701 in
      1 in = 25.4 mm

      How to use it

      1. Type the number of millimeters.
      2. Read the result in inches.
      3. Open the table for common values, or use the reverse converter to go from inches to millimeters.

      Worked examples

      1 mm in inches

      Inches
      0.0394 in

      10 mm in inches

      Inches
      0.3937 in

      Quick reference

      1 mm = 0.03937 in. 2 mm = 0.07874 in. 3 mm = 0.11811 in. 5 mm = 0.19685 in. 6 mm = 0.23622 in. 8 mm = 0.31496 in. 10 mm = 0.3937 in. 12 mm = 0.47244 in.

      Good to know

      The inch is defined as exactly 2.54 centimeters, and the foot as exactly 0.3048 meters, so conversions between metric and US customary lengths are exact rather than approximate.

      Questions people ask

      How many inches are in 1 mm?

      1 mm is 0.0393701 in.

      How do I convert millimeters to inches?

      Divide by 25.4. For example, 6 mm × 0.0393701 = 0.23622 in.

      What is 50 mm in inches?

      50 mm is 1.9685 in.

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