42.105 Millimeters to Inches

42.105 mm ≈ 1.6577 in

Closest fraction: 1 2132(1.65625 in — differs by less than 1%)

Calculation: in = 42.105 mm × 0.0393701 ≈ 1.6577 in

Millimeter to Inch Converter

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Sig. Figures:

How long is 42.105 mm?

42.105 mm (4.21 cm) is comparable to the width of a thumb or the diameter of a coin.

What does 42.105 mm look like?

Comparable to the width of a thumb or the diameter of a coin
42.105 mm (4.21 cm) is comparable to the width of a thumb or the diameter of a coin.

42.105 mm on the inch scale

mm01020304050in00.511.5

42.11 mm = 1.658 in

How to Convert Millimeter to Inch

1 millimeter = 0.0393701 inches exact

Inch = Millimeter × 0.0393701

Example: 42.105 mm × 0.0393701 = 1.6577 in

Reverse Conversion

To convert inches back to millimeters:

  • Remember, 1 inch equals 25.4 millimeters.
  • To convert 1.6577 in to mm, multiply 1.6577 x 25.4, resulting in 42.105 mm.

exact This conversion factor is exact by international definition.

42.105 mm is also equal to:

  • 4.2105 centimeter
  • 0.042105 meter
  • 0.13814 feet
  • 0.046047 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 42.105 millimeters in inches?

42.105 millimeters equals 1.6577 inches. This is calculated by multiplying 42.105 by the conversion factor 0.0393701.

What does 42.105 millimeters look like in inches?

42.105 millimeters (1.6577 inches) is one to four inches — a small component or connector.

How do you calculate 42.105 millimeters to inches?

Multiply 42.105 by the conversion factor 0.0393701. The calculation is 42.105 × 0.0393701 = 1.6577 inches. This factor is defined by international measurement standards.

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42.105 millimeters = 1.65768 inches
42.105 millimeters = 1.65768 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.