A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a unit of astronomical distance.

Light-years measure astronomical distances, which are incredibly vast. Feet measure much smaller, terrestrial distances, so converting feet to light-years results in a very tiny fraction.

This specific conversion is rarely used in everyday life. It's primarily relevant in astronomy and physics when dealing with vast scales of space and comparing them to human-scale measurements.

There are 5,280 feet in one mile.