CM to MM Converter

Convert centimeters to millimeters instantly with our free online tool

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Centimeters to Millimeters Conversion

Our CM to MM converter provides instant, accurate conversions between centimeters and millimeters. Whether you're working on a school project, DIY task, or professional measurement, this tool makes the conversion process simple and error-free.

How to Use the CM to MM Converter

  1. Enter the value in centimeters (cm) in the input field
  2. Click the "Convert to Millimeters" button
  3. View the converted value in millimeters (mm) displayed below

Understanding Centimeters and Millimeters

What is a Centimeter (cm)?

A centimeter is a unit of length in the metric system equal to one hundredth of a meter. The centimeter is commonly used for everyday measurements where a meter would be too large, such as measuring the height of a person or the length of a pencil.

What is a Millimeter (mm)?

A millimeter is a unit of length in the metric system equal to one thousandth of a meter (or one tenth of a centimeter). Millimeters are used for precise measurements, such as the thickness of paper or small mechanical parts.

The Conversion Formula

The conversion between centimeters and millimeters is straightforward because both units are part of the metric system:

1 centimeter (cm) = 10 millimeters (mm)

To convert centimeters to millimeters, simply multiply the centimeter value by 10.

Frequently Asked Questions

How many millimeters are in a centimeter?

There are exactly 10 millimeters in 1 centimeter. This conversion is consistent because both units are part of the metric system which uses base-10 conversions.

Is 10 mm equal to 1 cm?

Yes, 10 millimeters is exactly equal to 1 centimeter. This is the fundamental relationship between these two metric units of length.

How do you convert 5 cm to mm?

To convert 5 cm to mm, multiply by 10: 5 cm × 10 = 50 mm. You can also use our converter above by entering "5" in the centimeter field.

Which is bigger, cm or mm?

Centimeters are larger than millimeters. There are 10 millimeters in every centimeter, so 1 cm is 10 times bigger than 1 mm.

When should I use cm vs mm?

Use centimeters for everyday measurements (like clothing sizes or furniture dimensions) and millimeters when you need more precision (like engineering drawings or small craft projects). Our converter works for both small and large values.

Conversion Table: CM to MM

Here's a quick reference table for common centimeter to millimeter conversions:

Centimeters (cm) Millimeters (mm)
0.1 cm 1 mm
0.5 cm 5 mm
1 cm 10 mm
2 cm 20 mm
5 cm 50 mm
10 cm 100 mm
20 cm 200 mm
50 cm 500 mm
100 cm 1000 mm