GCD Calculator
Find the largest number that divides two numbers evenly.
Greatest Common Divisor
6
Least Common Multiple
36
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How It Works
Enter two whole numbers to see their GCD and LCM.
GCD(a, b) is the largest positive integer that divides both a and b without a remainder
Example
The GCD of 12 and 18 is 6.
Frequently Asked Questions
- What is GCD used for?
- Simplifying fractions to lowest terms, and solving problems that involve dividing quantities into equal groups.
- What's the GCD of two numbers where one divides the other evenly?
- It's the smaller number — for example, GCD(4, 12) = 4.
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