4.2 cm to mm = 42 mm

4.2 cm = 42 mm. To convert centimeters to millimeters, multiply by 10: 4.2 × 10 = 42.

4.2 cm = 42 mm

How to convert centimeters to millimeters

mm = cm × 10

  1. 1 cm = 10 mm (and 1 mm = 0.1 cm).
  2. Multiply the amount by the factor: 4.2 × 10 = 42.
  3. Answer: 4.2 cm = 42 mm.

Centimeters to Millimeters table

Centimeters (cm)Millimeters (mm)
3.7 cm37 mm
3.8 cm38 mm
3.9 cm39 mm
4 cm40 mm
4.1 cm41 mm
4.2 cm42 mm
4.3 cm43 mm
4.4 cm44 mm
4.5 cm45 mm
4.6 cm46 mm
4.7 cm47 mm
cmmm
1 cm10 mm
5 cm50 mm
10 cm100 mm
50 cm500 mm
100 cm1,000 mm
1,000 cm10,000 mm

Good to know

1 inch = 2.54 cm exactly; 1 cm = 10 mm; 1 m = 100 cm; 1 foot = 12 inches = 30.48 cm.

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  • "4.2 cm to mm = 42 mm". WorksheetGenius.com. Accessed on November 3, 2026. http://worksheetgenius.com/unit-converter/convert-4.2-cm-to-mm/.

  • "4.2 cm to mm = 42 mm". WorksheetGenius.com, http://worksheetgenius.com/unit-converter/convert-4.2-cm-to-mm/. Accessed 3 November, 2026

  • 4.2 cm to mm = 42 mm. WorksheetGenius.com. Retrieved from http://worksheetgenius.com/unit-converter/convert-4.2-cm-to-mm/.