The formula for converting AC voltage to DC is: AC = DC/0.636. The same formula may be used to convert DC voltage into AC voltage.
AC is short for alternating current and describes an electrical charge that changes direction periodically. AC has a longer range than DC, so it is typically used to connect generated electricity from power plants to homes and businesses.
DC is short for direct current and describes a constant current in one direction. DC is commonly used in most household electronics. Anything that uses batteries, a USB cable or an AC adapter is powered by DC.