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What is the GCD Calculator?
The GCD (Greatest Common Divisor) Calculator finds the largest positive integer that divides two numbers without a remainder. It is also known as the Greatest Common Factor (GCF).
How to Use This Calculator
1
Enter the first number.
2
Enter the second number.
3
Click 'Calculate' to find the GCD.
Example Calculation
12 and 18
The divisors of 12 are 1, 2, 3, 4, 6, 12. The divisors of 18 are 1, 2, 3, 6, 9, 18. The largest common divisor is 6.
Frequently Asked Questions
Pro Tips
- The GCD is useful for simplifying fractions.
- If the GCD is 1, the numbers are said to be 'coprime' or 'relatively prime'.