GCD and LCM Calculator
Find the greatest common divisor and least common multiple of a list of whole numbers using exact integer arithmetic.
Start with your input
Edit the example or replace it with your own text.
How to use GCD and LCM Calculator
- Load the example or enter your own values.
- Choose the relevant options and run the tool.
- Review the result, then copy it or download a local file.
When this tool is useful
Find a shared divisor for reducing quantities or a common multiple for repeating cycles. Paste integers separated by commas or whitespace. The result reports the greatest common divisor and the least common multiple for the whole list. Negative inputs are treated by their magnitudes because the standard nonnegative results are the useful convention for these operations.
Reading the result and limitations
At least two and at most one hundred integers are required, with a maximum of one hundred digits per input. Decimal notation and scientific notation are rejected instead of rounded. Any zero makes the least common multiple zero; the greatest common divisor of an all-zero list is reported as zero by convention. Results are decimal strings because exact values may exceed JavaScript’s safe integer range.
Example input
12, 18, 30
What are the main limits of GCD and LCM Calculator?
At least two and at most one hundred integers are required, with a maximum of one hundred digits per input. Decimal notation and scientific notation are rejected instead of rounded. Any zero makes the least common multiple zero; the greatest common divisor of an all-zero list is reported as zero by convention. Results are decimal strings because exact values may exceed JavaScript’s safe integer range.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.