Kilometer Conversions

Use this easy and mobile-friendly calculator to convert between Kilometers and other units of Astronomy.
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1 Kilometer ≈
0.00000000000010570008 Light Years
result rounded
Decimal places
A kilometer, or kilometre, is a unit of length equal to 1,000 meters, or about 0.621 miles. In most of the world, it is the most common unit for measuring distance between places.
Light Years
A light year is the distance that light travels in one year. The year used by the International Astronomical Union is 365.25 days. A light year is defined as exactly 9,460,730,472,580.8 kilometers.