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Least Common Multiple (LCM)

Calculate Least Common Multiple (LCM) instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

Least Common Multiple (LCM)

Number a
Number b
LCM
12
Calculate Least Common Multiple (LCM) instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

More about: Least Common Multiple (LCM)

What it calculates

The “Least Common Multiple (LCM)” calculator computes LCM from 2 parameters: number a, number b.

A core calculation for studying, engineering tasks, and checking solutions.

Example calculation

With parameters Number a = 4, Number b = 6 the result is 12.

How to use

  1. Enter number a and number b — each field above is adjustable with a slider.
  2. LCM is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Least Common Multiple (LCM) calculated?
The Least Common Multiple (LCM) calculator computes LCM from number a, number b. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Least Common Multiple (LCM) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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