Greatest common factor calculator
Published On: 05/03/2026
Greatest Common Factor (GCF) Calculator
Enter two or more integers to find the greatest common factor (also called greatest common divisor, GCD). This calculator also shows the simplified ratio (divide all numbers by the GCF).
Inputs explained:
• Numbers: enter integers separated by commas, spaces, or new lines (example: 24, 36, 60).
• Negative numbers are allowed (GCF is computed using absolute values).
• Ignore invalid tokens: if enabled, the calculator skips non-integer entries instead of stopping.
• Numbers: enter integers separated by commas, spaces, or new lines (example: 24, 36, 60).
• Negative numbers are allowed (GCF is computed using absolute values).
• Ignore invalid tokens: if enabled, the calculator skips non-integer entries instead of stopping.
Tip: Use integers only. Decimals are not supported for GCF.
Greatest Common Factor Calculator — Description
The Greatest Common Factor (GCF) Calculator finds the largest integer that divides evenly into two or more integers. This value is also known as the greatest common divisor (GCD). Enter your numbers separated by commas, spaces, or new lines, and the calculator computes the GCF and shows the simplified values after dividing each number by the GCF.
The calculator uses the Euclidean algorithm, an efficient method for finding the GCD by repeated division. This tool is useful for simplifying fractions, reducing ratios, factoring expressions, and solving number theory problems.