How to use the Greatest Common Factor Calculator
The GCF calculator finds the largest number that divides all numbers in a list.
Open the Greatest Common Factor Calculator →
What you need to enter
- Whole numbers
The formula
It uses the Euclidean algorithm: GCF(a, b) = GCF(b, a mod b).
Worked example
Using the default values in the calculator:
- Whole numbers: 48, 180, 72
| GCF | 12 |
| LCM | 720 |
Tips for better results
- Use it to simplify fractions.
- Works for whole numbers.
Common mistakes to avoid
- Mixing it up with LCM.
- Entering zero.