LCM & GCD Calculator — Any List of Numbers
Greatest common divisor and least common multiple of any list of integers, exact. Client-side.
How to use
- 1 Enter two or more integers, separated by commas or spaces.
- 2 The GCD and LCM are computed instantly.
- 3 Large results are exact (arbitrary precision).
Why use this tool
- GCD and LCM of any list of numbers in one step.
- Exact results even for very large numbers.
- Runs entirely in your browser.
Frequently asked questions
What is the GCD?
The greatest common divisor — the largest integer that divides all the given numbers without a remainder.
What is the LCM?
The least common multiple — the smallest positive integer that is a multiple of all the given numbers.
How are they related?
For two numbers, gcd(a, b) × lcm(a, b) = |a × b|. The GCD is found with the Euclidean algorithm; the LCM follows from it.
Can I enter more than two numbers?
Yes — the GCD and LCM are computed across the whole list pairwise.
What is LCM & GCD Calculator?
An LCM/GCD calculator finds the greatest common divisor and least common multiple of a list of integers using the Euclidean algorithm, with exact arbitrary-precision arithmetic.
LCM & GCD Calculator is a free math utility by Zerethon Tools. Greatest common divisor and least common multiple of any list of integers, exact. Client-side. Runs entirely in the browser — no signup, no upload.
- Category
- Math
- Pricing
- Free
- Privacy
- Browser-based
- Signup
- Not required
Privacy
Your data never leaves your browser unless explicitly stated. LCM & GCD Calculator runs entirely client-side — no server upload, no logging, no tracking of your input.
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