8.42 Inches to Centimeters

8.42 in ≈ 21.387 cm

Calculation: cm = 8.42 in × 2.54 ≈ 21.387 cm

Inch to Centimeter Converter

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How long is 8.42 in?

8.42 in (21.4 cm) is comparable to the length of a school ruler.

What does 8.42 in look like?

Comparable to the length of a school ruler
8.42 in (21.4 cm) is comparable to the length of a school ruler.

8.42 in on the centimeter scale

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8.42 in = 21.39 cm

How to Convert Inch to Centimeter

1 inch = 2.54 centimeters exact

Centimeter = Inch × 2.54

Example: 8.42 in × 2.54 = 21.387 cm

Reverse Conversion

To convert centimeters back to inches:

  • Remember, 1 centimeter equals 0.393701 inches.
  • To convert 21.387 cm to in, multiply 21.387 x 0.393701, resulting in 8.42 in.

exact This conversion factor is exact by international definition.

8 inches equals 20.32 cm — a standard small tablet screen size (iPad mini is 8.3 inches). Also the diameter of a standard cake pan.

8.42 in is also equal to:

  • 213.87 millimeter
  • 0.21387 meter
  • 0.00021387 kilometer
  • 0.70167 feet
  • 0.23389 yard
About these units

Inch: Imperial/US customary unit standardized as exactly 25.4 millimeters since 1959.

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

Frequently Asked Questions

How much is 8.42 inches in centimeters?

8.42 inches equals 21.387 centimeters. This is calculated by multiplying 8.42 by the conversion factor 2.54.

What does 8.42 inches look like in centimeters?

8.42 inches (21.387 centimeters) is about the length of a hand span or a standard ruler segment.

How do you calculate 8.42 inches to centimeters?

Multiply 8.42 by the conversion factor 2.54. The calculation is 8.42 × 2.54 = 21.387 centimeters. This factor is defined by international measurement standards.

Share This Calculation

8.42 inches = 21.3868 centimeters
8.42 inches = 21.3868 centimeters — conversion chart

Nearby Conversions

0.42 inches1.067 centimeters 1.42 inches3.607 centimeters 2.42 inches6.147 centimeters 3.42 inches8.687 centimeters 4.42 inches11.23 centimeters 5.42 inches13.77 centimeters 6.42 inches16.31 centimeters 7.42 inches18.85 centimeters 9.42 inches23.93 centimeters 10.42 inches26.47 centimeters 11.42 inches29.01 centimeters 12.42 inches31.55 centimeters 13.42 inches34.09 centimeters 14.42 inches36.63 centimeters 15.42 inches39.17 centimeters 16.42 inches41.71 centimeters 17.42 inches44.25 centimeters 18.42 inches46.79 centimeters

For general conversions between inches and centimeters, see the inches to centimeters converter.

Also convert Inches 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.