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`"light second" = 299,786.05 km`

299786.054864755

A **Light Second** (299,786.05 km) is the distance light travels in one second.

One Light Second is equal to:

- 299,786.05 kilometers
- 186,278.42 miles
- 0.002 astronomical units (ua)
- 0.00000003 light years

The Speed of Light is 299,792,458.0 meter per second. Using that velocity, one can compute the distance light has traveled in a period of time.

This unit is often used in astronomy calculations is a simple linear transform.