How to convert Astronomical unit to Light-second

Conversion factor and calculation steps from Astronomical unit (au) to Light-second (ls).

Conversion logic

Each unit is defined via the base unit (meter (m)). The value is first converted to the base unit, then to the selected unit.

1 au = 149597870700 m

1 ls = 299792458 m

1 au × 149597870700 = 149597870700 m

149597870700 m ÷ 299792458 = 499.004783836 ls