20 Centimeters to Millimeters

20 cm = 200 mm

Calculation: mm = 20 cm × 10 = 200 mm

Centimeter to Millimeter 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 20 cm?

20 cm is comparable to the length of a school ruler.

What does 20 cm look like?

Comparable to the length of a school ruler
20 cm is comparable to the length of a school ruler.

20 cm on the millimeter scale

cm01020304050mm0100.0200.0300.0400.0500.0

20 cm = 200.0 mm

How to Convert Centimeter to Millimeter

1 centimeter = 10 millimeters exact

Millimeter = Centimeter × 10

Example: 20 cm × 10 = 200 mm

Reverse Conversion

To convert millimeters back to centimeters:

  • Remember, 1 millimeter equals 0.1 centimeters.
  • To convert 200 mm to cm, multiply 200 x 0.1, resulting in 20 cm.

exact This conversion factor is exact by international definition.

20 cm is also equal to:

About these units

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

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

Frequently Asked Questions

How much is 20 centimeters in millimeters?

20 centimeters equals 200 millimeters. This is calculated by multiplying 20 by the conversion factor 10.

What does 20 centimeters look like in millimeters?

20 centimeters (200 millimeters) is similar to a ruler length, a tablet screen, or a sheet of paper.

How do you calculate 20 centimeters to millimeters?

Multiply 20 by the conversion factor 10. The calculation is 20 × 10 = 200 millimeters. This factor is defined by international measurement standards.

Share This Calculation

20 centimeters = 200 millimeters
20 centimeters = 200 millimeters — conversion chart

Nearby Conversions

10 centimeters100 millimeters 11 centimeters110 millimeters 12 centimeters120 millimeters 13 centimeters130 millimeters 14 centimeters140 millimeters 15 centimeters150 millimeters 16 centimeters160 millimeters 17 centimeters170 millimeters 18 centimeters180 millimeters 19 centimeters190 millimeters 21 centimeters210 millimeters 22 centimeters220 millimeters 23 centimeters230 millimeters 24 centimeters240 millimeters 25 centimeters250 millimeters 26 centimeters260 millimeters 27 centimeters270 millimeters 28 centimeters280 millimeters 29 centimeters290 millimeters 30 centimeters300 millimeters

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

Also convert Centimeters 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.