Electric power in watts (W) to electric current in amps (A) calculator.
* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12
So The current I in amps (A) is equal to the power P in watts (W), divided by the voltage V in volts (V).
I(A) = P(W) / V(V)
What is the current in amps when the power consumption is 330 watts and the voltage supply is 120 volts?
I = 330W / 120V = 2.75A
What is the current in amps when the power consumption is 330 watts and the voltage supply is 140 volts?
I = 330W / 140V = 2.35A
So The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF times the RMS voltage V in volts (V).
I(A) = P(W) / (PF × V(V))
So The power factor of resistive impedance load is equal to [1].
What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 120 volts?
I = 330W / (0.8 × 120V) = 3.4375A
What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 150 volts?
I = 330W / (0.8 × 150V) = 2.75A
So The phase current I in amps (A) is equal to the power P in watts (W), divided by square root of 3 times the power factor PF times the line to line RMS voltage VL-L in volts (V).
I(A) = P(W) / (√3 × PF × VL-L(V) )
So The power factor of resistive impedance load is equal to [1].
What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 120 volts?
I = 330W / (√3 × 0.8 × 120V) = 1.984A
What is the phase current in amps when the power consumption is 330 watts, the power factor is 0.8 and the RMS voltage supply is 140 volts?
I = 330W / (√3 × 0.8 × 140V) = 1.701A
So The phase current I in amps (A) is equal to the power P in watts (W), divided by 3 times the power factor PF times the line to neutral RMS voltage VL-N in volts (V).
I(A) = P(W) / (3 × PF × VL-N(V) )
So The power factor of resistive impedance load is equal to [1].
Do not use typical power factor values for accurate calculations.
| Device | Typical power factor |
|---|---|
| Resistive load | 1 |
| Fluorescent lamp | 0.95 |
| Incandescent lamp | 1 |
| Induction motor full load | 0.85 |
| Induction motor no load | 0.35 |
| Resistive oven | 1 |
| Synchronous motor | 0.9 |
| Power (W) | Voltage (V) | Current (A) |
|---|---|---|
| 10 watts | 120 volts | 0.0833 amps |
| 20 watts | 120 volts | 0.167 amps |
| 30 watts | 120 volts | 0.250 amps |
| 40 watts | 120 volts | 0.333 amps |
| 50 watts | 120 volts | 0.417 amps |
| 60 watts | 120 volts | 0.500 amps |
| 70 watts | 120 volts | 0.583 amps |
| 80 watts | 120 volts | 0.667 amps |
| 90 watts | 120 volts | 0.750 amps |
| 100 watts | 120 volts | 0.833 amps |
| 200 watts | 120 volts | 1.667 amps |
| 300 watts | 120 volts | 2.500 amps |
| 400 watts | 120 volts | 3.333 amps |
| 500 watts | 120 volts | 4.167 amps |
| 600 watts | 120 volts | 5.000 amps |
| 700 watts | 120 volts | 5.833 amps |
| 800 watts | 120 volts | 6.666 amps |
| 900 watts | 120 volts | 7.500 amps |
| 1000 watts | 120 volts | 8.333 amps |
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