LCM and GCD calculator
Calculate the least common multiple and greatest common divisor of several numbers, with the prime factorization.
How to useType the numbers.
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LCM and GCD calculator: what it is for
The calculator finds the LCM and GCD of two or more numbers and shows the prime factorization of each one, so you can follow the math.
The LCM is used to add fractions with different denominators and the GCD to simplify fractions.
How to use
- Type the numbers separated by commas.
- See the LCM and GCD.
- Check each number's factorization.
When to use it
- Math homework.
- Adding and simplifying fractions.
- Problems about cycles and repeating events.
Frequently asked questions
What is the LCM?
The least common multiple is the smallest number that's a multiple of all the numbers at once. It's used to add fractions with different denominators.
What is the GCD?
The greatest common divisor (also called GCF or HCF) is the largest number that divides all the numbers with no remainder. It's used to simplify fractions.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.