How many watts is an 18volt power tool?

To determine the wattage of an 18-volt power tool, you need to know its amperage (current). Wattage is calculated using the formula: Watts = Volts × Amps. For example, if the tool draws 5 amps, the power would be 90 watts (18 volts × 5 amps). Without the amperage, you cannot calculate the exact wattage.