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Math

GCD LCM Calculator

Find greatest common divisor and least common multiple for two integers.

Last validated: 2026-02-14

Use this free online GCD LCM Calculator to compute greatest common divisor and least common multiple for integers. It is useful when you need a focused browser-based utility that turns a specific set of inputs into a practical result quickly. The form focuses on First integer (a), Second integer (b) and returns GCD and LCM Inputs, Results, so you can move from input to answer without setting up a spreadsheet or custom script. Run one realistic example, adjust the inputs, and compare how the result changes before you copy or share it. Save the inputs with the result when the output will be shared, audited, or used as part of a larger workflow.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

GCD and LCM Inputs

Results

GCD: 6

LCM: 144

Coprime: No

How to use this tool

  1. Enter First integer (a), Second integer (b) for the gcd lcm calculator, keeping units, dates, or text format consistent with the form labels.
  2. Check optional fields and assumptions before running so the result matches the workflow you have in mind.
  3. Click "Run the tool" and review GCD and LCM Inputs, Results for the primary output.
  4. Copy or share the result together with the inputs so the output can be reproduced later.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

  • A: 48
  • B: 18
  • Gcd: 6
  • Lcm: 144
  • Coprime:

Expected Outputs

  • A: 48
  • B: 18
  • Gcd: 6
  • Lcm: 144

Interpretation

Confidence and limitations

Formula References

Assumptions

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