GCF Calculator

Find the greatest common factor (GCF/GCD) of two or more integers. Free and instant.

GCF Calculator

Find the greatest common factor (GCF/GCD) of two or more integers.

GCF (GCD)

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GCF Calculator

This free GCF calculator finds the greatest common factor (also called the greatest common divisor, GCD) of two or more integers. Enter numbers separated by commas or spaces. Switch to the LCM tab if you also need the least common multiple.

  • GCF (GCD) for two or more numbers
  • Comma- or space-separated input
  • Copy and reset
  • Mobile-friendly

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Added Jun 29, 2026

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