How to convert light-years to kilometers
To convert light-years (ly) to kilometers (km), multiply the value in light-years by 9,460,730,472,580.
km = ly × 9,460,730,472,580
Example: 1 ly = 9,460,730,473,000 km.
You can also type 1 ly to km into the smart calculator, or mix units: 1 ly + 1 km.
Light-Years to Kilometers conversion table
| Light-Years | Kilometers |
|---|---|
| 0.01 ly | 94,607,305,000 km |
| 0.1 ly | 946,073,050,000 km |
| 0.25 ly | 2,365,182,600,000 km |
| 0.5 ly | 4,730,365,200,000 km |
| 1 ly | 9,460,730,500,000 km |
| 2 ly | 18,921,461,000,000 km |
| 3 ly | 28,382,191,000,000 km |
| 4 ly | 37,842,922,000,000 km |
| 5 ly | 47,303,652,000,000 km |
| 6 ly | 56,764,383,000,000 km |
| 7 ly | 66,225,113,000,000 km |
| 8 ly | 75,685,844,000,000 km |
| 9 ly | 85,146,574,000,000 km |
| 10 ly | 94,607,305,000,000 km |
| 12 ly | 113,528,770,000,000 km |
| 15 ly | 141,910,960,000,000 km |
| 20 ly | 189,214,610,000,000 km |
| 25 ly | 236,518,260,000,000 km |
| 30 ly | 283,821,910,000,000 km |
| 40 ly | 378,429,220,000,000 km |
| 50 ly | 473,036,520,000,000 km |
| 60 ly | 567,643,830,000,000 km |
| 75 ly | 709,554,790,000,000 km |
| 100 ly | 946,073,050,000,000 km |
| 250 ly | 2.3651826 × 10¹⁵ km |
| 500 ly | 4.7303652 × 10¹⁵ km |
| 1,000 ly | 9.4607305 × 10¹⁵ km |
Converting kilometers back to light-years
1 km = 1.057000834 × 10⁻¹³ ly. See the Kilometers to Light-Years converter, or press the swap button above.
About the units
Light-year (ly)
The distance light travels in one Julian year: exactly 9,460,730,472,580,800 meters.
Kilometer (km)
One thousand meters. A mile is about 1.609 kilometers.
Length measures distance in one dimension. The SI base unit is the meter, defined by the distance light travels in a vacuum in 1/299,792,458 of a second. Since the 1959 international yard and pound agreement, imperial and US customary lengths are defined exactly in meters: an inch is exactly 2.54 centimeters.
Questions and answers
How many kilometers are in a light-year?
One light-year (ly) equals 9,460,730,473,000 kilometers (km).
How do I convert light-years to kilometers?
To convert light-years to kilometers, multiply the value in light-years by 9,460,730,472,580. The formula is km = ly × 9,460,730,472,580. For example, 1 ly = 9,460,730,500,000 km.
What is 1 ly in km?
1 light-years is 9,460,730,473,000 kilometers.
Which is bigger, a light-year or a kilometer?
A light-year is bigger: 1 ly = 9,460,730,473,000 km.
How many centimeters are in a foot?
A foot is exactly 30.48 centimeters, because an inch is defined as exactly 2.54 cm and a foot is 12 inches.
Does this ly to km converter work offline?
Yes. ConvertEasy is a progressive web app: after your first visit it keeps working with no connection, and you can install it to your home screen from the browser menu.