1 light year = 9.46073e+12 kilometers
Convert light years to kilometers.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
km = ly × 9.46073e+12
Worked through with a real value: 10 light years = 9.46073e+13 kilometers.
Going the other way: ly = km × 1.05700e-13, so 1 kilometer = 1.05700e-13 light years.
What each unit is
- light year ly
- The distance light travels in a Julian year, about 9.46 trillion kilometres.
- kilometer km
- A thousand metres, and the unit road distances are measured in almost everywhere outside the United States and the United Kingdom.
Conversion tables
| light years (ly) | kilometers (km) |
|---|---|
| 1 | 9.46073e+12 |
| 2 | 1.89215e+13 |
| 3 | 2.83822e+13 |
| 4 | 3.78429e+13 |
| 5 | 4.73037e+13 |
| 6 | 5.67644e+13 |
| 7 | 6.62251e+13 |
| 8 | 7.56858e+13 |
| 9 | 8.51466e+13 |
| 10 | 9.46073e+13 |
| 20 | 1.89215e+14 |
| 25 | 2.36518e+14 |
| 50 | 4.73037e+14 |
| 75 | 7.09555e+14 |
| 100 | 9.46073e+14 |
| kilometers (km) | light years (ly) |
|---|---|
| 1 | 1.05700e-13 |
| 2 | 2.11400e-13 |
| 3 | 3.17100e-13 |
| 4 | 4.22800e-13 |
| 5 | 5.28500e-13 |
| 6 | 6.34201e-13 |
| 7 | 7.39901e-13 |
| 8 | 8.45601e-13 |
| 9 | 9.51301e-13 |
| 10 | 1.05700e-12 |
| 20 | 2.11400e-12 |
| 25 | 2.64250e-12 |
| 50 | 5.28500e-12 |
| 75 | 7.92751e-12 |
| 100 | 1.05700e-11 |
Questions
How many kilometers are in a light year?
1 light year = 9.46073e+12 kilometers.
How do I convert light years to kilometers?
Use km = ly × 9.46073e+12. For example, 10 light years = 9.46073e+13 kilometers.
How many light years are in one kilometer?
1 kilometer = 1.05700e-13 light years.
What is 10 light years in kilometers?
10 light years = 9.46073e+13 kilometers.
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