Light-years to kilometers
Type a value in ly to get it in km instantly.
9.461×10¹²km
That's 383× as far as Voyager 1, while Proxima Centauri is 4.2× further. Light takes about 1 years to cross it.
What it means
How far is that?
One astronomical unit is defined as exactly 149,597,870,700 m, and a light-year uses the Julian year of 365.25 days.
The math
How to convert ly to km
To convert light-years to kilometers, multiply by 9.461×10¹².
Example: 1 ly × 9.461×10¹² = 9.461×10¹² km.
In the other direction, 1 km = 1.057×10⁻¹³ ly.
Every unit
Your distance in every unit
Tables
ly to km conversion table
| ly | km |
|---|---|
| 0.1 ly | 9.461×10¹¹ km |
| 0.5 ly | 4.73×10¹² km |
| 1 ly | 9.461×10¹² km |
| 2 ly | 1.892×10¹³ km |
| 5 ly | 4.73×10¹³ km |
| 10 ly | 9.461×10¹³ km |
| 25 ly | 2.365×10¹⁴ km |
| 50 ly | 4.73×10¹⁴ km |
| 100 ly | 9.461×10¹⁴ km |
| 500 ly | 4.73×10¹⁵ km |
| 1,000 ly | 9.461×10¹⁵ km |
km to ly conversion table
| km | ly |
|---|---|
| 0.1 km | 1.057×10⁻¹⁴ ly |
| 0.5 km | 5.285×10⁻¹⁴ ly |
| 1 km | 1.057×10⁻¹³ ly |
| 2 km | 2.114×10⁻¹³ ly |
| 5 km | 5.285×10⁻¹³ ly |
| 10 km | 1.057×10⁻¹² ly |
| 25 km | 2.643×10⁻¹² ly |
| 50 km | 5.285×10⁻¹² ly |
| 100 km | 1.057×10⁻¹¹ ly |
| 500 km | 5.285×10⁻¹¹ ly |
| 1,000 km | 1.057×10⁻¹⁰ ly |
Quick answers
Quick answers
- How many km is 1 ly?
- 1 ly is 9.461×10¹² km.
- How many km is 10 ly?
- 10 ly is 9.461×10¹³ km.
The units
About these units
Light-years (ly)
How far light travels in a Julian year: 9.46 trillion kilometers.
Kilometers (km)
Kilometers, which run out of usefulness beyond the planets.
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