LCM Calculator
Find the least common multiple of two integers.
Results are provided for general informational use. Verify important financial, health or legal figures before relying on them.
About this LCM Calculator
The LCM Calculator finds the smallest positive number that is a multiple of both integers. It is useful when aligning repeating cycles, finding common denominators and solving many elementary number problems.
For related tasks, try GCD Calculator, Prime Number Checker or Fraction Calculator.
How the calculation works
The calculator uses the relationship LCM(a,b) = |a × b| ÷ GCD(a,b). This avoids listing every multiple and remains fast for ordinary integer inputs.
How to use it
- Enter two integers.
- Select Calculate LCM.
- Review the least common multiple.
Practical example
The LCM of 12 and 18 is 36 because 36 is the smallest positive value divisible by both 12 and 18.
Frequently asked questions
What happens if one number is zero?
The LCM is reported as zero.
Is LCM always larger than both numbers?
Not always. If one number is already a multiple of the other, the larger number is the LCM.
Can negative numbers be used?
Yes. Their absolute values are used.
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