CConvyra

GCD/LCM Calculator

Calculate the greatest common divisor and least common multiple of two numbers.

12GCD
72LCM

How to use GCD/LCM Calculator

  1. 1Enter two positive integers.
  2. 2The GCD and LCM update live.

Why use this tool

  • Uses the Euclidean algorithm for fast, accurate GCD computation.

Frequently asked questions

How is LCM calculated from GCD?

LCM(a, b) = (a × b) / GCD(a, b) — this tool computes GCD first via the Euclidean algorithm, then derives LCM from it.

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