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How many millimeters in 4.2 centimeters? Convert 4.2 centimeters to millimeters with our accurate calculator. Get instant, precise results for all your conversion needs.
Conversion Formula
1 cm = 10 mmmillimeter = centimeter × 104.2 × 10 = 42.00004.2 centimeter = 42.0000 millimeter
Quick estimation for 4.2 centimeter: Mentally shift the decimal point one place to the right (4.2 becomes 42).
Precise calculation method: Multiply 4.2 by the exact conversion factor of 10.000000 to yield 42.0000 millimeter.
Visual reference technique: Imagine a standard ruler where 4.2 cm is clearly 4 cm plus 2 small millimeter marks.
To convert 4.2 centimeter to millimeter, multiply by the conversion factor of 10.000000. The calculation is 4.2 × 10.000000 = 42.0000 millimeter.
4.2 centimeter equals exactly 42.000000 millimeter. For practical applications requiring high precision, this is often expressed as 42.0000 millimeter.
Objects measuring approximately 4.2 centimeter include a Sony NP-BX1 camera battery (length 4.27 cm), a standard house key (blade length ~4.5 cm), and a standard sugar packet (length ~4.5 cm).
Converting centimeter to millimeter is essential for precision engineering, detailed technical drawings, and manufacturing processes where finer granularity is required. It is also common in fields like jewelry making, electronics, and medical device design where small dimensions are critical for functionality and fit.
The easiest way to remember is that there are 10 millimeters in 1 centimeter. Therefore, to convert from centimeters to millimeters, simply move the decimal point one place to the right. For 4.2 cm, this directly gives 42.0 mm.