Kilometre to Light-year
Free instant kilometre to light-year converter. 1 km = 1.0570e-13 ly.
Common Kilometre to Light-year values
| Kilometre (km) | Light-year (ly) |
|---|---|
| 1 | 1.0570e-13 |
| 5 | 5.2850e-13 |
| 10 | 1.0570e-12 |
| 25 | 2.6425e-12 |
| 50 | 5.2850e-12 |
| 100 | 1.0570e-11 |
| 500 | 5.2850e-11 |
| 1000 | 1.0570e-10 |
How does Kilometre to Light-year conversion work?
Type a value in the Kilometre (km) field and the equivalent in Light-year (ly) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Kilometre. A metric unit equal to 1,000 metres. About 0.62 miles. A typical brisk-walk pace covers a kilometre in 10–12 minutes.
Light-year. The distance light travels in one year — about 9.46 trillion kilometres. Used in astronomy for stellar distances.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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