42.171 Millimeters to Centimeters

42.171 mm = 4.2171 cm

Calculation: cm = 42.171 mm × 0.1 = 4.2171 cm

Millimeter to Centimeter Converter

Choose the type of measurement to convert
Select the source unit to convert from
Select the target unit to convert to
Enter a numeric value or fraction to convert
Sig. Figures:

How long is 42.171 mm?

42.171 mm (4.22 cm) is comparable to the width of a thumb or the diameter of a coin.

What does 42.171 mm look like?

Comparable to the width of a thumb or the diameter of a coin
42.171 mm (4.22 cm) is comparable to the width of a thumb or the diameter of a coin.

42.171 mm on the centimeter scale

mm01020304050cm012345

42.17 mm = 4.217 cm

How to Convert Millimeter to Centimeter

1 millimeter = 0.1 centimeters exact

Centimeter = Millimeter × 0.1

Example: 42.171 mm × 0.1 = 4.2171 cm

Reverse Conversion

To convert centimeters back to millimeters:

  • Remember, 1 centimeter equals 10 millimeters.
  • To convert 4.2171 cm to mm, multiply 4.2171 x 10, resulting in 42.171 mm.

exact This conversion factor is exact by international definition.

42.171 mm is also equal to:

  • 0.042171 meter
  • 1.6603 inch
  • 0.13836 feet
  • 0.046119 yard
About these units

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

Centimeter: Metric unit equal to one hundredth (1/100) of a meter.

Frequently Asked Questions

How much is 42.171 millimeters in centimeters?

42.171 millimeters equals 4.2171 centimeters. This is calculated by multiplying 42.171 by the conversion factor 0.1.

What does 42.171 millimeters look like in centimeters?

42.171 millimeters (4.2171 centimeters) is one to four inches — a small component or connector.

How do you calculate 42.171 millimeters to centimeters?

Multiply 42.171 by the conversion factor 0.1. The calculation is 42.171 × 0.1 = 4.2171 centimeters. This factor is defined by international measurement standards.

Share This Calculation

42.171 millimeters = 4.2171 centimeters
42.171 millimeters = 4.2171 centimeters — conversion chart

For general conversions between millimeters and centimeters, see the millimeters to centimeters 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.