How to use the LCM & GCD Calculator
- Enter two or more numbers
- Separate them with commas
- See the LCM, GCD and prime factors
About this tool
Find the least common multiple (LCM) and greatest common divisor (GCD/HCF) of two or more numbers. LCM & GCD Calculator is part of ToolNest's collection of free math & converters. It works instantly in your browser with no account and no installation.
Frequently asked questions
Is the LCM & GCD Calculator free to use?
Yes. LCM & GCD Calculator on ToolNest is completely free, with no sign-up, no watermark and no daily limits.
How accurate is the LCM & GCD Calculator?
LCM & GCD Calculator uses standard, widely accepted formulas and calculates instantly as you type. Results are for general information — for important academic decisions, please confirm with a qualified professional or your institution.
Is my data saved anywhere?
No. Everything you enter stays in your browser. Nothing is sent to or stored on our servers.
Does LCM & GCD Calculator work on mobile phones?
Yes. ToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.