🔢 LCM & GCF Calculator
Find the Least Common Multiple and Greatest Common Factor of numbers.
What is a LCM & GCF Calculator?
Find the Least Common Multiple (LCM) and Highest Common Factor (HCF/GCD) of two numbers.
LCM(a,b) = (a×b)/GCD(a,b)📝 In-Depth Guide: Mastering LCM & GCF Calculator
LCM and HCF are the building blocks of arithmetic and number theory. They are used whenever you need to find a common rhythm between two repeating events.
Practical Uses
- LCM: Useful for finding when two events happening at different intervals will sync up again.
- GCD/HCF: Essential for simplifying fractions or finding the largest possible size for tiles in a room without cutting any.
Example
📌 Example Calculation
LCM(12, 18) = 36, HCF(12, 18) = 6
Frequently Asked Questions
The calculator applies the formula and assumptions explained on this page to the values you enter. Find the Least Common Multiple and Greatest Common Factor of numbers. Use our free lcm & gcf calculator online — instant results, no sign-up.
The arithmetic follows the displayed method, but accuracy depends on your inputs, units, assumptions, and rounding. Confirm important decisions with an authoritative source or qualified professional.
No. The calculation runs in your browser and does not require an account. Avoid sharing a prefilled result link if its inputs are sensitive.