Conversor de Ano-Luz
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
1 ano-luz ≈ 9,461 × 10¹² km
About this calculator
The Light-Year Converter is a practical tool for converting astronomical distances into kilometers. A light-year is the distance light travels in one year in a vacuum, approximately 9.461 trillion kilometers. This calculator performs the conversion by multiplying the light-year value by this factor, providing the result in km instantly.
Use this tool when you need to understand interstellar distances, such as the distance between stars or galaxies. For example, the closest star to the Sun, Proxima Centauri, is about 4.24 light-years away. With the converter, you get this measurement in kilometers, making comparisons with terrestrial scales easier.
Cautions: Remember that a light-year is a unit of distance, not time. Also, the exact value may vary slightly depending on the definition of a year (365.25 days). This calculator uses the standard 9.461 × 10¹² km, suitable for educational and general curiosity purposes.
Frequently asked questions
How many kilometers are in a light-year?
One light-year is approximately 9.461 × 10¹² km, or about 9.5 trillion kilometers.
What does light-year mean?
A light-year is a unit of distance, not time. It is the distance light travels in one year.
Can I convert light-years to other units like meters?
Yes, but this converter only converts to kilometers. For meters, multiply the result by 1000.
What is the distance from Earth to the nearest star in light-years?
The nearest star, Proxima Centauri, is about 4.24 light-years away.
Does the calculator use the exact value of a light-year?
It uses the standard value of 9.461 × 10¹² km, based on the Julian year of 365.25 days.