With the Watt Calculator, you can quickly and easily calculate the power in watts of an electrical appliance or system. To do this, enter the existing voltage in volts and the current in amperes, and the Watt Calculator will then automatically determine the corresponding wattage. The Watt Calculator is helpful, for example, to determine the power consumption of household appliances, to determine the required power of power supplies or batteries, or to calculate the optimal size of solar systems.
Would you like to calculate the voltage in volts or the current in amperes instead of calculating the wattage, i.e., the electrical power? If so, you can use our guide pages with the Ampere Calculator or the Volt Calculator.