LCM Calculator
Find the least common multiple of whole numbers.
What this calculator does
Enter an integer list to calculate its least common multiple with safe-range checks.
Inputs and what they mean
- Whole numbers
- — text value.
How to use it
- Enter the requested values.
- Choose the calculation mode when available.
- Review the result and supporting breakdown.
Formula
For non-zero integers, LCM(a,b)=|a×b|÷GCF(a,b); any list containing zero has LCM zero.
Worked example
LCM of 12, 18, and 30
Their least common multiple is 180.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.
Common questions
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