42.272 Millimeters to Inches

42.272 mm ≈ 1.6643 in

Closest fraction: 1 4364(1.67188 in — differs by less than 1%)

Calculation: in = 42.272 mm × 0.0393701 ≈ 1.6643 in

Millimeter to Inch Converter

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Sig. Figures:

How long is 42.272 mm?

42.272 mm (4.23 cm) is comparable to the width of a thumb or the diameter of a coin.

What does 42.272 mm look like?

Comparable to the width of a thumb or the diameter of a coin
42.272 mm (4.23 cm) is comparable to the width of a thumb or the diameter of a coin.

42.272 mm on the inch scale

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42.27 mm = 1.664 in

How to Convert Millimeter to Inch

1 millimeter = 0.0393701 inches exact

Inch = Millimeter × 0.0393701

Example: 42.272 mm × 0.0393701 = 1.6643 in

Reverse Conversion

To convert inches back to millimeters:

  • Remember, 1 inch equals 25.4 millimeters.
  • To convert 1.6643 in to mm, multiply 1.6643 x 25.4, resulting in 42.272 mm.

exact This conversion factor is exact by international definition.

42.272 mm is also equal to:

  • 4.2272 centimeter
  • 0.042272 meter
  • 0.13869 feet
  • 0.046229 yard
About these units

Millimeter: Metric unit equal to one thousandth (1/1000) of a meter.

Inch: Imperial/US customary unit standardized as exactly 25.4 millimeters since 1959.

Frequently Asked Questions

How much is 42.272 millimeters in inches?

42.272 millimeters equals 1.6643 inches. This is calculated by multiplying 42.272 by the conversion factor 0.0393701.

What does 42.272 millimeters look like in inches?

42.272 millimeters (1.6643 inches) is one to four inches — a small component or connector.

How do you calculate 42.272 millimeters to inches?

Multiply 42.272 by the conversion factor 0.0393701. The calculation is 42.272 × 0.0393701 = 1.6643 inches. This factor is defined by international measurement standards.

Share This Calculation

42.272 millimeters = 1.66425 inches
42.272 millimeters = 1.66425 inches — conversion chart

For general conversions between millimeters and inches, see the millimeters to inches converter.

Conversion factors verified against NIST, BIPM, ISO 80000-3 1 inch = 2.54 cm by international agreement (1959). Last reviewed: March 2026
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.