Convert kilometers to light-years
1 km = 0.000000000000105700083402 ly — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
1.05700083402e-13ly
As a fraction: 5/47303652362904
1 km = 0.000000000000105700083402 ly
How to convert kilometers to light-years
Multiply the number of kilometers by 0.000000000000105700083402 to get light-years.
Light-year: Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.
Kilometer to Light-year conversion table
| Kilometers (km) | Light-years (ly) |
|---|---|
| 1 km | 1.0570008e-13 |
| 2 km | 2.1140017e-13 |
| 3 km | 3.1710025e-13 |
| 5 km | 5.2850042e-13 |
| 10 km | 1.0570008e-12 |
| 20 km | 2.1140017e-12 |
| 25 km | 2.6425021e-12 |
| 50 km | 5.2850042e-12 |
| 100 km | 1.0570008e-11 |
| 250 km | 2.6425021e-11 |
| 500 km | 5.2850042e-11 |
| 1000 km | 1.0570008e-10 |
Light-year to Kilometer conversion table
| Light-years (ly) | Kilometers (km) |
|---|---|
| 1 ly | 9 460 730 500 000 |
| 2 ly | 18 921 461 000 000 |
| 3 ly | 28 382 191 000 000 |
| 5 ly | 47 303 652 000 000 |
| 10 ly | 94 607 305 000 000 |
| 20 ly | 189 214 610 000 000 |
| 25 ly | 236 518 260 000 000 |
| 50 ly | 473 036 520 000 000 |
| 100 ly | 946 073 050 000 000 |
| 250 ly | 2 365 182 600 000 000 |
| 500 ly | 4 730 365 200 000 000 |
| 1000 ly | 9 460 730 500 000 000 |
Frequently asked
How many light-years are in a kilometer?
One kilometer equals 1.057000834e-13 light-years (km → ly). That figure is exact, not rounded.
How do you convert kilometers to light-years?
Multiply the number of kilometers by 0.000000000000105700083402 to get light-years.
What is 1 ly in kilometers?
One light-year is 9460730473000 kilometers.
What is 10 km in ly?
10 km = 1.0570008e-12 ly.
What exactly is a light-year?
Light travelling for one Julian year (365.25 days) in vacuum — exact, since both inputs are defined values.