Light-year to Kilometre
Free instant light-year to kilometre converter. 1 ly = 9.4607e+12 km.
Common Light-year to Kilometre values
| Light-year (ly) | Kilometre (km) |
|---|---|
| 1 | 9.4607e+12 |
| 5 | 4.7304e+13 |
| 10 | 9.4607e+13 |
| 25 | 2.3652e+14 |
| 50 | 4.7304e+14 |
| 100 | 9.4607e+14 |
| 500 | 4.7304e+15 |
| 1000 | 9.4607e+15 |
How does Light-year to Kilometre conversion work?
Type a value in the Light-year (ly) field and the equivalent in Kilometre (km) 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.
Light-year. The distance light travels in one year — about 9.46 trillion kilometres. Used in astronomy for stellar distances.
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.
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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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