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GCD / LCM Calculator

Find GCD and LCM of two or more numbers

GCDLCMgreatest common divisorleast common multiple

📖 How to Use

Enter multiple positive integers separated by commas or spaces
Click Calculate to see both GCD and LCM

📐 Formula

GCD uses the Euclidean algorithm
LCM(a,b) = |a×b| / GCD(a,b)

❓ FAQ

How many numbers can I enter?▾

There's no limit — enter as many as you like, separated by commas.

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About GCD / LCM Calculator

This tool is completely free, no registration required. Works directly in your browser. Supports both PC and mobile devices.

GCD / LCM Calculator is a free online tool that works on both PC and mobile. No registration or download required — just open in your browser. Results are accurate and reliable for everyday use and professional reference.