Centimeters to Millimeters converter (cm to mm)
Convert Centimeters (cm) to Millimeters (mm) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
How to convert Centimeters to Millimeters
1 centimeter (cm) is equal to 10 millimeters (mm).
1 cm = 10 mm
The length L in millimeters (mm) is equal to the length L in centimeters (cm) multiplied by 10:
Example: Convert 5 cm to mm:
L(mm) = 5 × 10 = 50 mm
What is a Centimeters?
The centimetre (cm) is 1÷100 of a metre. Clothing sizes, height charts, and school geometry problems commonly use centimetres.
What is a Millimeters?
The millimetre (mm) is 1÷1,000 of a metre. Machining, rainfall, and small product dimensions are specified in millimetres.
This page converts length from Centimeters into Millimeters. One cm equals 10 mm.
Centimeters to Millimeters conversion table
Common cm values and the matching mm result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 0 cm | 0 mm |
| 1 cm | 10 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 30 cm | 300 mm |
| 40 cm | 400 mm |
| 50 cm | 500 mm |
| 60 cm | 600 mm |
| 70 cm | 700 mm |
| 80 cm | 800 mm |
| 90 cm | 900 mm |
| 100 cm | 1000 mm |
| 150 cm | 1500 mm |
| 200 cm | 2000 mm |
How this calculator works
The form on this page is a Centimeters-to-Millimeters converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the mm result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many mm are in 1 cm?
1 cm = 10 mm.
How do I convert Centimeters to Millimeters?
The length L in millimeters (mm) is equal to the length L in centimeters (cm) multiplied by 10:
Is this cm to mm converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.