ToolNest

🔢GCD & LCM Calculator

Calculate the Greatest Common Divisor and Least Common Multiple.

🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup

Calculate GCD and LCM of two numbers online for free. Instant results with formula.

GCD (Greatest Common Divisor)

6

LCM (Least Common Multiple)

36

GCD(12,18) = 6 | LCM(12,18) = 36

How to Use GCD & LCM Calculator — Step by Step

  1. 1Enter two or more numbers separated by commas
  2. 2Click 'Calculate' — GCD (Greatest Common Divisor) and LCM (Least Common Multiple) are shown
  3. 3Step-by-step working using the Euclidean algorithm is displayed
  4. 4Useful for fraction simplification and scheduling problems

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Frequently Asked Questions

Is this tool completely free?

Yes. All ToolNest tools are 100% free with no signup required, no account, and no watermarks added to output files.

Are my uploaded files secure and private?

All uploads use HTTPS encryption during transfer. Files are processed on secure isolated servers and automatically deleted within 2 hours of upload.

Does this tool work on mobile phones?

Yes. ToolNest works on any modern browser on iPhone, Android, tablet, or desktop — no app download or plugin needed.

Do I need to create an account?

No. Just open the tool, upload your file, and download the result. No email, no signup, no password.