Watts to amps calculator

Watts to Amps calculator

It is used to convert the electric power in watts (W) to the current in amps (A). You can start by selecting the type of electric current. It can either be Direct Current (DC) or the Alternating Current (AC) single phase/ three phase. Enter the power in watts and the voltage in volts before clicking the ‘Calculate' button which performs the conversion. The current result in amps is displayed below the two switch controls, and you can always perform a variety of calculations after resetting the calculator.

Calculating the DC watts to amps

I (A) = P (W) / V (V), where the current in amps is computed by dividing the power in watts by the voltage in volts.

For example;

If the power consumption is 214 watts with a voltage supply of 145V, what is the current in amps?

Solution

I (A) = P (W) / V (V)

= 214 W / 145 V = 1.4586 amps (A)

Calculating the AC single phase watts to amps

I (A) = P (W) / (PF x V (V), where the phase current in amps is calculated by dividing the real power in watts by the power factor multiplied by voltage in volts

For example;

If the power consumption is 186 watts and the power factor is 0.4. What is the phase current in amps if the voltage RMS is 158 Volts?

Solution

I (A) = P (W) / (PF x V (V)

= 186 W/ (0.4 X 110 V) = 2.943 amps (A)

Calculating the AC three phase watts to amps

Line to line Voltage

I (A) = P (W) / (√3 x PF x V L-L (V)), which means that the phase current in amps is computed by dividing the real power in watts by the multiplication of square root of three, time the power factor. Then the result is multiplied by the line to line voltage RMS in volts.

Line to Neutral voltage

I (A) = P (W) / (3 x PF x V L-N (V)), which means that the phase current in amps is computed by dividing the real power in watts by the multiplication of three by the power factor multiplied by the line to neutral voltage in volts.