Math
GCD & LCM Calculator
Euclidean algorithm — works with two numbers and more.
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Greatest Common Divisor (GCD)
Least Common Multiple (LCM)
Enter at least two numbers
What does GCD & LCM Calculator?
The GCD & LCM calculator computes the greatest common divisor and least common multiple for two or more numbers.
How to use GCD & LCM Calculator?
- Enter the numbers separated by commas.
- The tool calculates GCD and LCM automatically.
- GCD and LCM are displayed instantly.
Key features
- Euclidean algorithm for greatest common divisor
- Supports more than two numbers
- LCM derived from GCD without brute-force multiplication
Frequently asked questions
What is the Greatest Common Divisor (GCD)?
The GCD is the largest number that divides all given numbers without a remainder. For example, GCD(12,18) = 6.
What is the Least Common Multiple (LCM)?
The LCM is the smallest number divisible by all given numbers. For example, LCM(4,6) = 12.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.