Free online LCM and GCD calculator. Find the least common multiple and greatest common divisor of two or three numbers. Shows step-by-step calculation. Pure frontend.
How to Use
- Enter Numbers
Input 2 or 3 positive integers. The tool supports numbers up to 99,999,999. - Choose Calculation
Click LCM, GCD, or Both to compute. Results appear instantly with step-by-step details. - Review Results
View the LCM, GCD, and product of your numbers. The step-by-step breakdown shows how each value is calculated.
FAQ
What is LCM?
LCM (Least Common Multiple) is the smallest positive integer that is divisible by all given numbers. Example: LCM(12, 18) = 36.
What is GCD?
GCD (Greatest Common Divisor) is the largest positive integer that divides all given numbers without remainder. Example: GCD(12, 18) = 6.
How is LCM related to GCD?
For two numbers a and b: LCM(a,b) Γ GCD(a,b) = a Γ b. This relationship helps compute one from the other.
Can I calculate LCM/GCD for more than 2 numbers?
Yes! Enter up to 3 numbers. The tool calculates the LCM/GCD progressively across all numbers.
Where is LCM/GCD used in real life?
LCM is used in fractions (common denominator), scheduling (recurring events), and gear ratios. GCD is used in simplifying fractions and cryptography.