42 Millimeters to Feet

42 mm ≈ 0.1378 ft

Calculation: ft = 42 mm × 0.00328084 ≈ 0.1378 ft

Millimeter to Foot Converter

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How long is 42 mm?

42 mm (4.2 cm) is comparable to the width of a thumb or the diameter of a coin.

What does 42 mm look like?

Comparable to the width of a thumb or the diameter of a coin
42 mm (4.2 cm) is comparable to the width of a thumb or the diameter of a coin.

42 mm on the feet scale

mm01020304050ft00.050.10.15

42 mm = 0.1378 ft

How to Convert Millimeter to Feet

1 millimeter = 0.00328084 feet

Feet = Millimeter × 0.00328084

Example: 42 mm × 0.00328084 = 0.1378 ft

Reverse Conversion

To convert feet back to millimeters:

  • Remember, 1 foot equals 304.8 millimeters.
  • To convert 0.1378 ft to mm, multiply 0.1378 x 304.8, resulting in 42 mm.

42 mm is also equal to:

Frequently Asked Questions

How much is 42 millimeters in feet?

42 millimeters equals 0.1378 feet. This is calculated by multiplying 42 by the conversion factor 0.00328084.

What does 42 millimeters look like in feet?

42 millimeters (0.1378 feet) is one to four inches — a small component or connector.

How do you calculate 42 millimeters to feet?

Multiply 42 by the conversion factor 0.00328084. The calculation is 42 × 0.00328084 = 0.1378 feet. This factor is defined by international measurement standards.

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42 millimeters = 0.137795 feet
42 millimeters = 0.137795 feet — conversion chart

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

Also convert Millimeters to:

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