Astronomy Conversions

From

To

Amount

Result

1 Light Year =
9,460,730,472,580.8 Kilometers
(exact result)

Display Result As

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. Therefore a light year is exactly 9,460,730,472,580.8 kilometers.

Kilometers

A kilometer 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.

Astronomy Conversion Tables

(some results are rounded)
1 Astronomical Unit = 1 Kilometer = 1 Light Minute = 1 Light Second = 1 Light Year =
Astronomical Units 16.6846 x 10-90.12020.00200463,241
Kilometers 149,597,871117,987,547299,7929.4607 x 1012
Light Minutes 8.31675.5594 x 10-810.01667525,960
Light Seconds 499.003.3356 x 10-660131,557,600
Light Years 1.5813 x 10-51.057 x 10-131.9013 x 10-63.1688 x 10-81
Miles 92,955,8070.621411,176,944186,2825.8786 x 1012
Parsecs 4.8481 x 10-63.2408 x 10-145.8294 x 10-79.7156 x 10-90.3066
1 Mile = 1 Parsec =
Astronomical Units 1.0758 x 10-8206,265
Kilometers 1.60933.0857 x 1013
Light Minutes 8.947 x 10-81,715,452
Light Seconds 5.3682 x 10-6102,927,125
Light Years 1.7011 x 10-133.2616
Miles 11.9174 x 1013
Parsecs 5.2155 x 10-141