Math · NUMORA
Gcd Lcm Calculator
Greatest common divisor and least common multiple.
Open interactive calculatorHow to use
Euclid’s algorithm for gcd, then ab/gcd for lcm.
Formula
lcm(a,b) = ab / gcd(a,b)
FAQ
Is this Gcd Lcm calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Euclid’s algorithm for gcd, then ab/gcd for lcm.
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