GCD & LCM Calculator
MathGreatest common divisor and least common multiple.
Enter two or more positive integers
The Greatest Common Divisor (GCD) is the largest integer that divides two or more numbers without remainder, while the Least Common Multiple (LCM) is the smallest integer that all of them divide evenly. GCD is used to simplify fractions, and LCM is used to find common denominators. Both are computed efficiently with the Euclidean algorithm, which repeatedly takes remainders until reaching zero.
How to use GCD & LCM Calculator
- 1Open the GCD & LCM Calculator calculator above.
- 2Enter your values into the input fields.
- 3Read the result shown instantly.
Formula
GCD: Euclidean algorithm | LCM = (a × b) ÷ GCD
Example
12, 18 → GCD 6, LCM 36.
FAQs
What is GCD & LCM Calculator؟
Greatest common divisor and least common multiple.
Is GCD & LCM Calculator free to use?
Yes — it is 100% free, runs entirely in your browser, and needs no sign-up.
Does GCD & LCM Calculator work on mobile?
Yes, it is fully responsive and works on phones, tablets, and desktops.
