Ljusår Avstånd Kalkylator
Konvertera mellan ljusår, kilometer, miles, astronomiska enheter (AE), parsek, ljussekunder och ljusminuter.
Kosmiska avstånd
1 ljusår = 9,461 biljoner km. Ljus färdas med 299 792 km/s.
The light year distance calculator converts between seven astronomical distance units: light years, kilometers, miles, astronomical units (AU), parsecs, light seconds, and light minutes. Enter a value in any unit and see all six other conversions simultaneously — essential for astronomy enthusiasts, students, and science educators.
A light year is the distance light travels in one vacuum year: approximately 9.461 trillion kilometers or 5.879 trillion miles. Light moves at exactly 299,792.458 km per second, making it the universal speed limit. For scale: sunlight takes 8.3 minutes to reach Earth (1 AU), while the nearest star Proxima Centauri is 4.24 light years away — meaning the light you see from it tonight left the star over 4 years ago.
The interactive cosmic distances table lets you click on famous celestial objects — from Proxima Centauri (4.24 ly) to the Andromeda Galaxy (2.5 million ly) — and instantly see the distances in all units. Use this alongside our Unit Converter for terrestrial measurements and Speed Calculator for earthly speed problems.
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