Kilometers to Light Years converter
Free online kilometers to light years converter. Convert km to ly instantly in your browser. 100% client-side, no uploads, no account required.
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Formula
Light Years = Kilometers × conversion factor
See also
Frequently asked questions
How do I convert kilometers to light years?
Use the calculator on this page. Enter any value in kilometers and the equivalent in light years is computed instantly. The conversion uses the exact factor: 1 KM = LY × factor. The full formula is shown in the "Formula" section above.
Is the kilometers to light years conversion exact?
Yes, the conversion is computed with full floating-point precision and rounded to 10 significant digits by default. All math runs in your browser — your input is never uploaded, never stored, and never logged. The result is reproducible and matches standard reference values.
Can I convert in batch?
Yes. The Unit Converter on this site has a batch mode: paste one value per line and click "Convert Batch" to get every result in one go. The batch output is plain text you can copy.