Paste a list of whole numbers and get their greatest common factor, the largest number that divides every value in the list without a remainder. The greatest common factor, also called the highest common factor or greatest common divisor, is what you use to reduce fractions to lowest terms and to simplify ratios and algebraic expressions. Many calculators stop at two numbers, but this one folds the Euclidean algorithm across your whole list to find the shared factor of all of them at once. It uses BigInt arithmetic, so it stays exact even for very large inputs where floating point would lose digits. Enter your numbers separated by commas, spaces, or new lines, and the GCF appears instantly. Everything is computed locally in your browser, so your data stays private.
The GCF is the largest number that divides every value in your list evenly, so the GCF of 12 and 18 is 6.
It applies the Euclidean algorithm, which repeatedly takes remainders to find the shared factor quickly and exactly.
Yes. Greatest common factor and greatest common divisor mean the same thing.
Paste a list of whole numbers and get their greatest common factor, the largest number that divides every value in the list without a remainder. The greatest common factor, also called the highest common factor or greatest common divisor, is what you use to reduce fractions to lowest terms and to simplify ratios and algebraic expressions.
Yes. GCF of a List Calculator is completely free, with no sign-up and no usage limits.
Yes. GCF of a List Calculator runs in any modern web browser. There is nothing to download or install.
Yes. GCF of a List Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.