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Length Conversion: mm to cm, cm to mm

Use the online conversion calculators to convert between millimeters (mm) and centimeters (cm).

Conversion Calculators

Enter your value in one of the conversion calculators below to convert mm to cm or convert cm to mm.

Convert mm to cm

Convert cm to mm

How to convert mm to cm: Use the conversion calculator on the left-hand side titled "Convert mm to cm". Enter a value in the mm field and click on the "Calculate cm" button. Your answer will appear in the cm field.

How to convert cm to mm: Use the conversion calculator on the right-hand side titled "Convert cm to mm". Enter a value in the cm field and click on the "Calculate mm" button. Your answer will appear in the mm field.

Definitions

Below are definitions relating to these conversion formulas:

Unit Symbol Measurement System Description
inches in or " US Customary Units (and Imperial)  
feet ft or ' US Customary Units (and Imperial) 1 foot = 12 inches
yards yd US Customary Units (and Imperial) 1 yard = 3 feet
miles mi US Customary Units (and Imperial) 1 mile = 1760 yards or 5280 feet
millimeter mm Metric System 1000 mm = 1 m
centimeter cm Metric System 100 cm = 1 m, 1 cm = 10 mm
decimeter dm Metric System 10 dm = 1 m, 1 dm = 10 cm
meter m Metric System 1 m = 1000 mm, 100 cm, 10 dm
kilometer km Metric System 1 km = 1000 m