Centimeters to Millimeters Converter (cm to mm)

Use this free online centimeter to millimeter converter to quickly convert cm to mm. Simply enter the value in centimeters, and the tool will instantly display the equivalent length in millimeters.

How to Convert Centimeters to Millimeters

Converting cm to mm is simple, since both units belong to the metric system. To convert a value from centimeters to millimeters, multiply the number of centimeters by 10.

Formula: mm = cm × 10

Example: Convert 15 cm to mm. 15 cm × 10 = 150 mm So, 15 centimeters is equal to 150 millimeters.

You can also convert cm to mm by simply moving the decimal point one place to the right.

What is a Centimeter?

A centimeter (cm) is a unit of length in the metric system, equal to one-hundredth (1/100) of a meter. It is commonly used to measure medium-length objects such as notebooks, phone screens, and everyday items.

What is a Millimeter?

A millimeter (mm) is a unit of length equal to one-thousandth (1/1000) of a meter. It is the smallest unit typically marked on a standard ruler and is used where higher precision is required, such as in engineering, manufacturing, and mechanical drawings.

Centimeter to Millimeter Relationship

1 cm = 10 mm 1 mm = 0.1 cm

Since a meter contains 100 centimeters and 1000 millimeters, every centimeter naturally equals 10 millimeters.

Cm to Mm Conversion Table

Centimeters (cm)	Millimeters (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

Solved Examples

Example 1: Convert 8 cm to mm. 8 × 10 = 80 mm

Example 2: Convert 45.5 cm to mm. 45.5 × 10 = 455 mm

Example 3: Which is greater, 12 cm or 100 mm? 12 cm = 120 mm, so 12 cm is greater than 100 mm.

Frequently Asked Questions