Ano-luz → km
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
1 ly = 9,461×10¹² km
About this calculator
The light-year to kilometer converter is a useful tool for transforming astronomical distances into more understandable units. A light-year is the distance light travels in one year, approximately 9.461 trillion kilometers. This unit of measurement is commonly used in astronomy to express distances between stars, galaxies, and other celestial objects.
The formula to convert light-years to kilometers is simple: 1 light-year is equal to 9.461 × 10¹² kilometers. This conversion is based on the speed of light in a vacuum, which is approximately 299,792 kilometers per second. By multiplying this speed by the number of seconds in a year, we arrive at the value of 9.461 trillion kilometers.
When to use this calculator? Whenever you need to express astronomical distances in more familiar units, such as kilometers. For example, if you want to know the distance to a star in kilometers, just enter the distance in light-years and click convert.
A common care when working with light-years is to remember that this unit of measurement is extremely large. Therefore, it's essential to be careful when performing calculations and conversions to avoid errors.
Frequently asked questions
What is a light-year?
A light-year is the distance light travels in one year, approximately 9.461 trillion kilometers.
Why use light-years instead of kilometers?
Light-years are more suitable for expressing astronomical distances, as they are easier to understand and work with large numbers.
How to convert light-years to kilometers?
Just multiply the light-year value by 9.461 × 10¹².
What are the applications of the light-year to kilometer converter?
It's useful in astronomy, astrophysics, space navigation, and education.
What is the accuracy of the converter?
Accuracy depends on input and calculator; generally, it's quite accurate.