Length

cm to mm converter

Type a value to convert cm to mm instantly. 1 cm equals about 10 mm.

Enter cm

⇄ Convert mm to cm instead

cm → mm
10mm
1 cm converted
How to convert
mm = cm × 10
Reverse: cm = mm × 0.1

Converting cm to mm

cm (centimeter) and mm (millimeter) are units of length. One cm equals 10 mm. Just type a value in the box above to convert instantly — useful for recipes, drawings, product specs and travel between metric and imperial units.

cm to mm conversion chart

cmmm
1 cm10 mm
2 cm20 mm
3 cm30 mm
5 cm50 mm
10 cm100 mm
20 cm200 mm
50 cm500 mm
100 cm1,000 mm

Frequently asked questions

How many mm are in one cm?
1 cm = 10 mm.
How do I convert mm back to cm?
Multiply the mm value by 0.1 to get cm.
Is my input sent to a server?
No. Everything is calculated locally in your browser and nothing is uploaded or stored.