# CM to MM Convert centimeters to millimeters with configurable decimal precision > Canonical page: https://elysiatools.com/en/tools/cm-to-mm - **Category:** Math & Numbers - **Keywords:** centimeters, millimeters, length, conversion, cm, mm ## Overview Quickly convert centimeters to millimeters with high accuracy and customizable decimal precision. This tool allows you to input any centimeter value and instantly generates the equivalent length in millimeters, formatted in a clean, structured JSON output. ## Inputs - **Centimeters** (text): e.g. 2.5 - **Decimal Precision** (number) ## When to use - When translating architectural blueprints or CAD drawings from centimeters to millimeters. - When preparing product specification sheets that require precise millimeter dimensions. - When performing scientific or engineering calculations that demand exact metric conversions with custom rounding. ## How it works - Enter the length value in centimeters into the Centimeters input field. - Set your desired decimal precision between 0 and 10 to control the rounding of the output. - View the calculated millimeter result instantly in the structured JSON output box. ## Use cases - Converting product dimensions for e-commerce listings that require millimeter-level accuracy. - Standardizing mechanical component measurements from cm to mm for manufacturing specs. - Converting physical measurements for school projects or scientific lab reports. ## Frequently asked questions ### How do you convert centimeters to millimeters? Multiply the centimeter value by 10. For example, 2.5 cm multiplied by 10 equals 25 mm. ### What is the maximum decimal precision supported? You can configure the output precision up to 10 decimal places. ### Can I input fractional or decimal centimeter values? Yes, the tool accepts decimal inputs like 0.75 or 12.34 cm. ### Is there a limit to the number of centimeters I can convert? No, there is no upper limit on the centimeter value you can input for conversion. ### Why does the tool output the result in JSON format? 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