Is LCM & GCD Calculator free?

Yes, completely free with unlimited calculations and no registration required. Use it as many times as you need.

What is the difference between LCM and GCD?

GCD (Greatest Common Divisor) is the largest number that divides both numbers evenly. LCM (Least Common Multiple) is the smallest number that both numbers divide into evenly.

What numbers can I calculate?

You can calculate LCM and GCD for positive integers from 1 to 999,999. The calculator does not support negative numbers, decimals, or zero.

Does LCM & GCD Calculator work on mobile?

Yes, works on all devices including iPhone, Android tablets, and desktop computers. The calculator is fully responsive and mobile-optimized.

Why is GCD also called HCF?

GCD and HCF (Highest Common Factor) are the same thing. Different regions use different terminology, but they calculate identical results.

Can I calculate LCM and GCD for more than two numbers?

This calculator works with two numbers at a time. To find LCM or GCD for three or more numbers, calculate the result for the first two, then use that result with the third number.

Is my data safe with this calculator?

Yes, completely safe. All calculations happen in your browser. Your numbers are never sent to any server or stored anywhere.

simple

LCM & GCD Calculator — simple

Calculate least common multiple and greatest common divisor.

Enter numbers (comma or space separated)

How to use LCM & GCD Calculator

Enter your first number

Click the 'First Number' input field at the top of the calculator and type your first positive integer. You can enter numbers up to 999,999.

Enter your second number

Click the 'Second Number' input field directly below the first number and type your second positive integer. Both fields accept whole numbers only.

Click the Calculate button

Press the blue 'Calculate' button located beneath both input fields to process your numbers instantly.

View your results

The results section displays both the GCD (Greatest Common Divisor) and LCM (Least Common Multiple) in separate labeled boxes with clear formatting.

Clear and calculate again

Click the 'Clear' button to reset all fields and enter new numbers. Your previous results will be erased immediately.

Frequently Asked Questions

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