A light-year is the distance light travels in a vacuum in one Julian year (365.25 days).

There are approximately 946,073,047,258,080,000 centimeters in one light-year.

While not commonly done in practice due to the immense numbers, it can be useful for specific scientific or educational comparisons to visualize extremely large distances using a familiar, albeit tiny, unit.

2 light-years is equal to 1,892,200,000,000,000,000 centimeters.