Electric current in amps (A) to electric power in watts (W) calculator.
* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12
Ampere (A) is a unit of electric current. Electric current is the rate of electric charge flow per time unit. One ampere (A) is equal to one coulomb (Q) per second (s).
Watt (W) is a unit of power. Power is the rate of energy usage per time unit. One watt (W) is equal to one joule (J) per second (S).
The power P in watts (W) is equal to the current I in amps (A), times the voltage V in volts (V):
P(W) = I(A) × V(V)
The power P in watts (W) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V):
P(W) = PF × I(A) × V(V)
The power P in watts (W) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V):
P(W) = √3 × PF × I(A) × VL-L(V)
The power P in watts (W) is equal to 3 times the power factor PF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V):
P(W) = 3 × PF × I(A) × VL-N(V)
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 |
| Current (A) | Voltage (V) | Power (W) |
|---|---|---|
| 0.1 amps | 120 volts | 12 watts |
| 0.2 amps | 120 volts | 24 watts |
| 0.3 amps | 120 volts | 36 watts |
| 0.4 amps | 120 volts | 48 watts |
| 0.5 amps | 120 volts | 60 watts |
| 0.6 amps | 120 volts | 72 watts |
| 0.7 amps | 120 volts | 84 watts |
| 0.8 amps | 120 volts | 96 watts |
| 0.9 amps | 120 volts | 108 watts |
| 1 amps | 120 volts | 120 watts |
| 2 amps | 120 volts | 240 watts |
| 3 amps | 120 volts | 360 watts |
| 4 amps | 120 volts | 480 watts |
| 5 amps | 120 volts | 600 watts |
| 6 amps | 120 volts | 720 watts |
| 7 amps | 120 volts | 840 watts |
| 8 amps | 120 volts | 960 watts |
| 9 amps | 120 volts | 1080 watts |
| 10 amps | 120 volts | 1200 watts |
