Inches to Millimeters

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How many inches in a millimeter?

  • There are 0.0394 inches in a millimeter.
  • 1 mm = 0.0394 in

How to convert inches to millimeters?

Use the formula below to convert inches to millimeters:

millimeters = inches × 25.4

For example, let’s convert 5 inches to millimeters:

millimeters = 5 × 25.4 = 127 millimeters

So, 5 inches are equal to 127 millimeters.