Power in watts equals amperes times voltage. So, in a direct current, 1 amp at 110 volts equals 110 watts, whereas 1 amp at 220 volts equals 220 watts. More » Science Measurements

The question of how many watts equal 1 horsepower depends on how you define horsepower. One mechanical horsepower unit is approximately equal to 745.7 watts. One electrical horsepower, used for rating electrical motors, ... More » Science Measurements

Watts cannot be calculated using the number of volts alone. Amperage is required, too. More » Home & Garden Home Maintenance Electrical
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In general, watts are calculated by taking the current, in amps, and multiplying by the voltage. AC currents involve additional steps, which may include multiplying by a power factor (for single-phase currents) or multip... More » Science Measurements

To calculate watts to voltage, different formulas, such as Power = I x V and Power = V squared / R, are used. These different physics formulas are then manipulated so that voltage is expressed in terms of certain other v... More » Science Measurements

Amps do not contain any volts. Volts and amps are two different types of electrical properties, and one does not contain the other. A relationship does exist between volts and amps, and Ohm's Law defines that relationshi... More » Science Measurements

One amp is equivalent to 1,000 milliamps, commonly denoted by the symbol mA. Amperage measures the amount of current flow in an electrical circuit in units of amperes, or amps. More » Science Measurements