Quick answer: 1 Light Year in Kilometer
1 ly equals 9460730472580.8 km. To convert Light Year to Kilometer, multiply by 9460730472580.8 using the free calculator above — no signup needed.
Length units
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About Length Converter
The Length Converter converts between 12 different units, including Meter, Kilometer, Centimeter, Millimeter, Micrometer. The base unit is the Meter, and every other unit on this page is defined as an exact multiple of it. Type any value into the calculator above to convert instantly — free, unlimited, no signup and nothing to install.
Common equivalents: 1 Meter = 0.001 Kilometer, 100 Centimeter, 1000 Millimeter.
Scale of this category: the smallest unit is the Nanometer (nm) and the largest is the Light Year (ly).
Last updated: 2026-09-15
Length conversion factors
| Unit | Symbol | Value in Meter |
|---|---|---|
| Meter | m | 1 m = 1 m |
| Kilometer | km | 1 km = 1000 m |
| Centimeter | cm | 1 cm = 0.01 m |
| Millimeter | mm | 1 mm = 0.001 m |
| Micrometer | µm | 1 µm = 0.000001 m |
| Nanometer | nm | 1 nm = 0.000000001 m |
| Mile | mi | 1 mi = 1609.34 m |
| Yard | yd | 1 yd = 0.9144 m |
| Foot / Feet | ft | 1 ft = 0.3048 m |
| Inch | in | 1 in = 0.0254 m |
| Nautical Mile | nmi | 1 nmi = 1852 m |
| Light Year | ly | 1 ly = 9460730472580800 m |
Worked Examples
See exactly how the conversion works with real numbers, step by step.
How much is 1 Light Year in Kilometer?
- Multiply 1 by the conversion factor 9460730472580.8
- 1 Light Year = 9460730472580.8 Kilometer
How much is 5 Light Year in Kilometer?
- Multiply 5 by the conversion factor 9460730472580.8
- 5 Light Year = 47303652362904 Kilometer
How much is 25 Light Year in Kilometer?
- Multiply 25 by the conversion factor 9460730472580.8
- 25 Light Year = 236518261814520 Kilometer
Quick Conversion Reference Table
| Light Year (ly) | Kilometer (km) |
|---|---|
| 1 ly (Light Year) | 9460730472580.8 km (Kilometer) |
| 2 ly (Light Year) | 18921460945161.6 km (Kilometer) |
| 5 ly (Light Year) | 47303652362904 km (Kilometer) |
| 10 ly (Light Year) | 94607304725808 km (Kilometer) |
| 20 ly (Light Year) | 189214609451616 km (Kilometer) |
| 50 ly (Light Year) | 473036523629040 km (Kilometer) |
| 100 ly (Light Year) | 946073047258080 km (Kilometer) |
| 500 ly (Light Year) | 4730365236290400 km (Kilometer) |
| 1000 ly (Light Year) | 9460730472580800 km (Kilometer) |
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FAQ
How much is 1 Light Year in Kilometer?
1 Light Year = 9460730472580.8 Kilometer.
How do I convert Light Year to Kilometer?
Enter your value in Light Year into the converter above and the result in Kilometer appears instantly. 1 ly equals 9460730472580.8 km — just multiply your value by 9460730472580.8.
What is the formula for Light Year to Kilometer?
The formula is: value in Kilometer = value in Light Year × 9460730472580.8. For example, 5 ly × 9460730472580.8 = 47303652362904 km.
Is this Light Year to Kilometer converter free and accurate?
Yes. This Light Year to Kilometer converter is 100% free, uses the exact international conversion factor (9460730472580.8), and works on any device with no signup.
How do I convert Kilometer back to Light Year?
To convert back, divide by 9460730472580.8 (or multiply by 0.000000000000105700083402). You can also use our dedicated How Many Light Year in 1 Kilometer? page for instant results.
Do I need to download an app or sign up?
No. The converter runs entirely in your browser — nothing to install, no account, no fees. It even keeps working offline once the page has loaded.
Which Length units are supported?
This converter supports 12 units: Meter, Kilometer, Centimeter, Millimeter, Micrometer, Nanometer, Mile, Yard, Foot / Feet, Inch, Nautical Mile, Light Year.