You will need to divide the result by 3 to find the current for a single wire in the circuit. Use the calculator to find the power of a current with any value of amps or watts. Convert Watts to Amps (Detailed Example). Learn the formulas, conventions, and differences between line-to-line and line-to-neutral voltages. The formula to convert amps to watts at a fixed voltage is: watts amps x volts. In practice, the power factor may be less than 1.0, which would result in a slightly higher current draw for the same amount of power. This formula calculates the total current for all three wires in a three-phase system. A tool that helps you convert watts to amps or amps to watts for different types of current, such as DC, AC single-phase, and AC three-phase. Watts to Amps Table (120V Single-Phase AC) This table assumes a power factor of 1.0, which means there is no phase shift between the voltage and current waveforms. The current I in amps is equal to the power P in watts divided by the product of the line-to-neutral voltage V in volts, the power factor PF, and 3. The power dissipated by the circuit can also be found using the values in Ohm’s Law. If you know the line-to-neutral voltage in a three-phase AC circuit, you can use the following formula to calculate the current: You will need to multiply the result by 3 to calculate the total current for all three pairs. This formula calculates the current draw for a single pair of wires in three-phase systems. Input the power value in Watts (W) into the provided field, and then press the 'Calculate' or 'Convert' button. The current I in amps is equal to the power P in watts divided by the product of the line-to-line voltage V in volts, the power factor PF, and the square root of 3. ![]() If you know the line-to-line voltage in a three-phase AC circuit, you can use the following formula to calculate the current: To calculate the current for three-phase AC circuits, you need to use a different formula to account for the three phases. You can calculate the power factor using a power factor calculator if needed. The current I in amps is equal to the power P in watts divided by the product of the voltage V and the power factor PF. You can use our watts to amps calculator or volts to amps calculator to calculate current in amps, given voltage in volts and power in watts.įor a single-phase AC circuit given a power factor, you can calculate the current using the following formula. The current I in amps is equal to the power P in watts divided by the voltage V. The power formula states that the current in amps is equal to the power in watts divided by the voltage. These are different values and as a result, you need additional information, in this case, the voltage, to convert one value to the other.You can also calculate electric current in amps if you know the power drawn from the circuit using the Watt’s Law power formula. This is because watts are a measure of energy per unit time and amps are a measure of current. As can be seen, by the equations above, converting watts to amps is not a direct conversion. ![]() The power factor is a measure of the efficiency of AC currents since they are represented by a single-phase sine wave. When solving for DC currents, leave the power factor section blank. ![]() The following equation can be used to convert watts to amps. Enter the power in watts, along with the voltage of the system, and whether the current is in DC or AC to convert the watts to amps.
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