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Millimetres (mm) to Inches

Convert mm to inches for engineering drawings and tooling.

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Formula: mm × 0.0393701 = in
How to use this converter
  1. 1Enter mm.
  2. 2Inches appears instantly.
Common questions
25.4 mm = 1 inch exactly.
10 mm = 0.394 inches.
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Inches to MillimetresCentimetres to InchesInches to Centimetres