How to use this calculator
Find the greatest common divisor, also called the greatest common factor, for two or more integers.
How the calculation works
- Enter integers separated by commas or spaces.
- The Euclidean algorithm is applied pair by pair.
- The final divisor is shown.
Formula
Euclidean algorithm: GCD(a, b) = GCD(b, a mod b).
Example
GCD(24, 36) = 12.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- Negative signs do not change the GCD.
- Decimals are treated as integers by truncation.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.