Light Years

Unsupported unit category.

What is a Light Years ?

A light year is not a unit of time — it’s a unit of distance.
It measures how far light travels in one year in space.

  • Speed of light = ~299,792,458 meters per second

  • 1 light year = 9.461 × 10¹² kilometers (about 9.5 trillion km!)

  • In meters, it’s approximately 9.461 × 10¹⁵ meters

It’s used in astronomy to express massive distances between stars, planets, and galaxies.

How to Convert Light Years into Other Units

Let’s break it down easily:

Why Convert Light Years into Other Units?

Quick Conversion Table

Light YearsKilometersMilesMetersFeet
19.461 × 10¹² km5.879 × 10¹² mi9.461 × 10¹⁵ m3.104 × 10¹⁶ ft
0.19.461 × 10¹¹ km5.879 × 10¹¹ mi9.461 × 10¹⁴ m3.104 × 10¹⁵ ft
0.019.461 × 10¹⁰ km5.879 × 10¹⁰ mi9.461 × 10¹³ m3.104 × 10¹⁴ ft
0.0019.461 × 10⁹ km5.879 × 10⁹ mi9.461 × 10¹² m3.104 × 10¹³ ft