GCD & LCM Calculator

Find the greatest common divisor and least common multiple of two integers.

Useful for simplifying, grouping, and aligning whole-number quantities.

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Calculate GCD and LCM

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First value

Second value

GCD

LCM

Enter dimensions or values only; results are mathematical estimates and do not replace construction, engineering, or academic requirements.

Context & Reference

For aligning or simplifying two whole-number quantities.

calculator guide

Finds GCD by remainder reduction and derives LCM from both inputs.

Use this calculator with your own values, then review the clearly labelled result and copy it when you need it elsewhere.

GCD is the shared largest divisor; LCM is the smallest shared multiple.

Find GCD and LCM of 12 and 18.

Both integers must be non-zero.

This calculator runs locally in this browser. Both integers must be non-zero.

Useful next steps

Continue with a closely related task, calculation, conversion, or local text tool.

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