FREE CALCULATOR
GCF Calculator
Find the greatest common factor of two whole numbers.
Greatest common factor6
CALCULATOR GUIDE
About the GCF Calculator
Find the greatest common factor, also called greatest common divisor, of integers.
How to use this calculator
- Enter the values requested by the calculator and check their units.
- Choose assumptions that match the scenario you want to estimate.
- Review the result and change one input at a time to compare scenarios.
- Verify important decisions against the relevant agreement, institution or official guidance.
How the calculation works
The GCF is the largest positive integer that divides every input without a remainder.
Example
The GCF of 18 and 24 is 6.
Things to keep in mind
- Enter integers and use the result to simplify fractions or factor expressions.
- Use integer inputs; the conventional GCF is nonnegative.
- The result is an estimate based on the inputs and assumptions provided.
- Check applicable terms and official guidance before making financial, employment or academic decisions.
Frequently asked questions
Is GCF the same as GCD?
Yes. Greatest common factor and greatest common divisor name the same concept.
Are results guaranteed or official?
No. The tool provides an estimate or arithmetic result and may not include every real-world rule, fee or policy.
Can I compare scenarios?
Yes. Change one input at a time to see how it affects the result.