GCD and LCM Calculator
One set of integers per line, e.g. 12, 18, 24 - batch GCD and LCM with Euclidean steps
Output:
Formula:
Separator:
Calculation Result
Download CSV
| No. | Value | GCD | LCM | Euclidean steps |
|---|
Introduction to the tool and how to use it
This GCD and LCM calculator processes one group of integers per line for batch calculation, suited to reducing fractions, finding common denominators, fraction arithmetic, and number-theory practice.
For a whole group, GCD is the largest common divisor of all numbers, LCM the smallest common multiple; when 0 appears, LCM is recorded as 0. All arithmetic uses BigInt, so integers with 20 or more digits stay exact as well.
For a whole group, GCD is the largest common divisor of all numbers, LCM the smallest common multiple; when 0 appears, LCM is recorded as 0. All arithmetic uses BigInt, so integers with 20 or more digits stay exact as well.
How to use
- Enter one group of integers per line, separated by commas or spaces, such as
12, 18, 24. - Choose the output (both, GCD only, or LCM only) and optionally tick to show Euclidean algorithm steps.
- Click Calculate; the results table shows GCD, LCM, and algorithm steps, with one-click copy and CSV export.
Common inputs
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