📏 Length
light-years to km Converter
Convert light-years to km instantly with a reference conversion table.
Quick answer: To convert light-years to km, multiply by 9461000000000.0. For example, 1 light-years = 9461000000000.0 km. Use the calculator below for any value.
light-years to km
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Common conversions
| light-years | km |
|---|
Formula:
How to convert light-years to km
1
Enter your value
Type the number of light-years you want to convert into the left box. The result in km appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — km to light-years. Your current value carries across so you don't have to re-enter anything.
3
About light-years and km
light-years and km are common length measurements.
📊 Common conversions at a glance
| light-years | km |
|---|---|
| 1e-07 | 9.461e+05 |
| 0.001 | 9.461e+09 |
| 1 | 9.461e+12 |
| 2 | 1.892e+13 |
| 4.24 | 4.011e+13 |
| 10 | 9.461e+13 |
Reviewed for 2026. light-years ↔ km conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.
Frequently asked questions
How do I convert light-years to km?
To convert light-years to km, multiply by 9461000000000.0. Or use the calculator above for instant results.
How many km are in 1 light-years?
1 light-years equals 9461000000000.0 km.
Is the light-years to km converter free?
Yes, the light-years to km converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.