Find the LCM and HCF of two or more numbers.
Instantly find the LCM (Least Common Multiple) and HCF (Highest Common Factor, also called GCD) of two or more numbers — a fundamental UPSC Quantitative Aptitude skill used in number system, fractions and time-based problems.
Please enter at least two positive whole numbers.
Enter two or more whole numbers separated by a comma or space (for example 12, 18, 24) and click Calculate. The tool instantly shows both the LCM and the HCF (GCD) of the numbers you entered.
The HCF (Highest Common Factor) of two or more numbers is the largest number that divides all of them exactly. The LCM (Least Common Multiple) is the smallest number that is a multiple of all of them. For any two numbers, LCM × HCF = Product of the two numbers.
LCM and HCF questions are common in the Number System chapter of UPSC CSE, CDS and NDA Quant sections, and also show up in time-and-work and fraction-based word problems. Practising with this calculator helps you verify your manual factorisation quickly.
Yes, simply enter as many numbers as you like, separated by commas or spaces.
HCF is also called GCD (Greatest Common Divisor) — both terms mean the same thing.