Least Common Multiple Calculator

1. Enter two or more nonzero integers in the Integers (comma or space separated) field.
2. Separate values with commas, spaces, or a mixture of both. Multiple separators are accepted.
3. Select Calculate to display the LCM and its calculation steps.

Review the result and calculation steps

After a successful calculation, review the displayed LCM and the visible Formula & steps area. It shows the values used and each intermediate result. For two integers, the calculator uses:

LCM(a, b) = |a × b| / GCF(a, b)

It finds the GCF with the Euclidean algorithm. For more than two integers, it processes the values pairwise:

LCM(a, b, c, ...) = LCM(LCM(a, b), c, ...)

Copy, download, or reset the result

• Select Copy result to copy the displayed calculation as text.
• Select Download result (.txt) to save the result and steps in a text file.
• Select Reset to clear the input, any displayed error, and the result section.

If copying is not permitted by the browser, the tool displays a message asking you to select and copy the result manually.

Accepted input and validation limits

• Enter nonzero integer strings with an optional leading + or - sign.
• Enter at least two and no more than 50 integers.
• Each integer may contain up to 100 digits, not counting its optional sign.
• Arithmetic uses exact BigInt values.
• The tool treats inputs as plain integers and does not interpret units or their real-world meaning.

Empty input, fewer than two integers, a zero, an invalid integer, more than 50 values, or a value longer than 100 digits produces a validation error instead of a result.

Privacy and local calculation

The calculator’s arithmetic runs locally in your browser. Its script.js calculation code does not make a request that sends the entered integers.

Frequently Asked Questions