DC Amps to watts calculation formula
P(W) =I(A) × V(V)
The power P in watts (W) is equal to the phase current I in amps (A), multiplied by the voltage V in volts (V).
So,
W = A x V
watts = amps x volts
For example:
Phase current (I) = 2,5A
Voltage (V) = 110V
Power (P) = 2,5A x 110V = 275W
AC single phase Amps to watts calculation formula
P(W) = PF × I(A) × V(V)
The real power P in watts (W) is equal to the power factor PF, multiplied by the phase current I in amps (A), multiplied by the RMS voltage V in volts (V).
So,
W = PF x A x V
watts = PF x amps x volts
For example:
Phase current (I) = 2,5A
Voltage (V) = 110V
PF = 0,7
Power (P) = 0,7 x 2,5A x 110V = 192,5W
AC three phase Amps to watts calculation formula
Line to line voltage
P(W) = √3 × PF × I(A) × VL-L (V)
The real power P in watts (W) is equal to square root of 3, multiplied by the power factor PF, multiplied by the phase current I in amps (A), multiplied by the line to line RMS voltage VL-L in volts (V).
So,
W = √3 x PF x A x V
watts = √3 x PF x amps x volts
For example:
Phase current (I) = 2,5A
Voltage (V) = 110V
PF = 0,7
Power (P) = √3 x 0,7 x 2,5A x 110V = 333,4W
Line to neutral voltage
P(W) = 3 × PF × I(A) × VL-N (V)
The real power P in watts (W) is equal to 3, multiplied by the power factor PF, multiplied by the phase current I in amps (A), multiplied by the line to neutral RMS voltage VL-N in volts (V).
So,
W = 3 x PF x A x V
watts = 3 x PF x amps x volts
For example:
Phase current (I) = 2,5A
Voltage (V) = 110V
PF = 0,7
Power (P) = 3 x 0,7 x 2,5A x 110V = 577,5W