What the tool does, how to run it, and what to expect from the result.
The least common multiple is the smallest number every input divides into evenly. Take each prime to its highest power across the factorizations: 12 = 2² × 3 and 18 = 2 × 3², so the LCM is 2² × 3² = 36. It is what you need for a common denominator when adding fractions.
A quick way to understand who this helps, what it solves, and where it connects next.
Students, teachers and anyone checking a calculation.
Using the lcm calculator without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Factor each number into primes and multiply each prime at its highest power. Or use LCM(a, b) = a × b ÷ GCF(a, b): 12 × 18 ÷ 6 = 36.
Adding or subtracting fractions (the LCM of the denominators is the least common denominator), and timing problems like when two repeating events next coincide.
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Enter your numbers and the result updates live in your browser. Nothing is uploaded and no server is used.
Calculations run locally in your browser; nothing is uploaded.