The HCF and LCM Calculator finds the Highest Common Factor and Lowest Common Multiple of two or more numbers instantly.
HCF (Highest Common Factor) or GCD (Greatest Common Divisor) is the largest number that divides all given numbers exactly.
LCM (Lowest Common Multiple) is the smallest number that is divisible by all given numbers.
HCF (also called GCD) is the largest number that divides all your numbers exactly, while LCM is the smallest number that all of them divide into evenly.
One method lists multiples until a common one is found, but the calculator uses prime factorisation or the relationship between HCF and the product of the numbers for instant results.
They are used to simplify fractions, schedule repeating events, solve ratio problems, and in many areas of mathematics and real-life timing problems.