light-year to km converter
1 light-year = 9.4607×10¹² km (9,460,730,472,580.8 km), or 9.4607×10¹⁵ m, based on the Julian year.
Conversion formula
1 light-year = 9.4607×10¹² km (9,460,730,472,580.8 km), or 9.4607×10¹⁵ m, based on the Julian year.
Conversion table
| 1 light-year | 9460730000000 km |
|---|---|
| 2 light-year | 18921500000000 km |
| 3 light-year | 28382200000000 km |
| 4 light-year | 37842900000000 km |
| 5 light-year | 47303700000000 km |
| 6 light-year | 56764400000000 km |
| 7 light-year | 66225100000000 km |
| 8 light-year | 75685800000000 km |
| 9 light-year | 85146600000000 km |
| 10 light-year | 94607300000000 km |
| 15 light-year | 141911000000000 km |
| 20 light-year | 189215000000000 km |
| 25 light-year | 236518000000000 km |
| 50 light-year | 473037000000000 km |
| 100 light-year | 946073000000000 km |
| 1000 light-year | 9460730000000000 km |
Reverse conversion table
| 1 km | 1.057e-13 light-year |
|---|---|
| 2 km | 2.114e-13 light-year |
| 3 km | 3.171e-13 light-year |
| 4 km | 4.228e-13 light-year |
| 5 km | 5.285e-13 light-year |
| 6 km | 6.34201e-13 light-year |
| 7 km | 7.39901e-13 light-year |
| 8 km | 8.45601e-13 light-year |
| 9 km | 9.51301e-13 light-year |
| 10 km | 1.057e-12 light-year |
| 15 km | 1.5855e-12 light-year |
| 20 km | 2.114e-12 light-year |
| 25 km | 2.6425e-12 light-year |
| 50 km | 5.285e-12 light-year |
| 100 km | 1.057e-11 light-year |
| 1000 km | 1.057e-10 light-year |
Key facts
| 1 light-year | 9,460,730,472,580.8 km |
|---|---|
| 1 light-year | 9.4607304725808×10¹⁵ m |
| 1 light-year | 63,241 AU (≈) |
| 1 light-year | 0.306601 parsec (≈) |
Frequently asked questions
How many km is 1 light-year?
1 light-year equals about 9.4607×10¹² km (9,460,730,472,580.8 km), the distance light travels in one Julian year.
Is a light-year a unit of distance?
Yes. Despite the word year, a light-year measures distance: 9.4607×10¹⁵ metres.
Reverse conversion
Printable A4 conversion cheat sheet — see the Downloads page