Back to Free Tools
FREE TOOLS
GCD and LCM calculator
Find the greatest common divisor and least common multiple of a list of integers exactly.
Numbers and dates
Text
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Enter values using decimal points and choose the operation or assumptions shown.
- Select Calculate and review the numerical result and its stated conventions.
- Download the result or amortization schedule when available. Reset restores the example inputs.
Examples
12, 18 and 30 have GCD 6 and LCM 180.
Limitations
- Runs locally. Decimal calculations use floating-point arithmetic, rounded to 12 significant digits; monetary displays use two decimals. Exact integer and fraction results are labelled separately.
- Up to 50 integers of 100 digits each. Signs are ignored. GCD of all zeros is zero by convention; any zero makes the LCM zero.
Related tools
No items found.