Light-day conversions

length conversions » light-day conversions
Length Conversions: light-day conversions - convert light-days to:
Convert light-days to

The online converter calculator on this page allows you to select the length/distance measurement unit you want to convert to starting from light-days. To make a conversion starting from a unit of length other than light-day, simply click on the "Reset" button.

What is light-day?


The light-day (or light day) is an astronomical unit of distance defined as the distance that light travels in free space (or vacuum) in one day.

The light-day is equal to 2.590206837x1013 meters (1 light-day = 2.590206837x1013 m), the base unit of length in the International System of Units (SI). It is also equal to 2.590x1010 kilometers (km) (an SI unit of length), or approximately 1.609x1010 miles (mi) or 8.4981x1013 feet (ft), which are US customary / Imperial units of length.

The light-day along with light-second, light-minute and light-hour are used in popular science publications. One light-day is equal to 86,400 light-seconds, or 1,440 light-minutes, or 24 light-hours or about 0.002738 light-years.