How much is one light year?

Light-year, a unit of length, refers to the distance that light travels in a vacuum. It is calculated from time and speed. The time that light travels for one year is called "one light-year." That’s about 946 billion kilometers per year. A more formal definition is: the distance traveled by a photon in free space and infinite distance from any gravitational or magnetic field in one Julian year (that is, 365.25 days, and each day is equal to 86,400 seconds). Because the speed of light in vacuum is 299,792,458 meters per second (accurately), one light year is equal to 9,460,730,472,580,800 meters. (Or 5,786,101,150,000 miles.

Or 5,108,385,784,330,890 nautical miles

Or approximately 9.46 × 10^15 m = 9.46 meters) is 9454254955488 kilometers (read: ninety-four thousand and four hundred and twenty-five thousand four hundred and ninety-five thousand four hundred and eighty-eight kilometers) (based on 60 seconds per minute 24 hours a day) Calculated with 365 days in a year)