๐ซLight-Year Converter
Convert light-years to kilometers, miles, AU, and parsecs instantly โ or find out how long light takes to travel any distance.
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Free Light Year Converter
Trying to make sense of cosmic distances? Our free light year converter turns light-years into kilometers, miles, astronomical units (AU), and parsecs in an instant โ and back again. Type a value into any field and watch every other unit update automatically, so you can compare the scale of a nearby star to the width of the Solar System without doing the math yourself.
Beyond simple conversion, the tool includes a light-travel-time mode: enter any distance and see exactly how long light takes to cross it, down to the minute or second for closer objects like the Moon or Sun, and in years for distant stars and galaxies.
Built for students, astronomy enthusiasts, and anyone curious about the universe's true scale. No sign-up, no downloads, no limits โ just accurate conversions whenever you need them. See the About page for the exact constants used, or the FAQ for common questions.