Watts to Amps Conversion Calculator (W to A) Power to Current

Watts to amps Conversion calculator:

For calculating amps from watts, enter watts, volts, and pf of our calculator then press the calculate button to get the Amps.

DC Amp Calculation:

DC current is equal to DC power divided by the applied voltage.

Let us assume,

I_(A) = Current in Amps

V_(V) = Voltage in Volts

P_(W) = DC Power in Watts

I_(A) = P_(W) / V_(V)

Current = Power / Volts

Single AC Amp from Watts Calculation:

Watt is the unit of real power P_(W)

Real Power = Voltage * Current * pf

Hence,

Current = Real power / (Voltage * pf)

I_(A) = P_(W) / (PF × V_(V))

Amps = Watt / (pf * Volts)

Therefore, single-phase AC current in Amp is equal to the real power divided by the multiplication of voltage and power factor.

AC three-phase current calculation from watts:

I_(A) = P_(W) / (3 * PF * V_L-N(V) )  ————–Line to neutral Voltage

Above mentioned formula describes the relationship between current, voltage, power and power factor. Here the current in amps is calculated from the real power divided by the three times of multiplication of the line to phase voltage and power factor.

While considering line to line voltage, the three-phase current I_(A) become,

I_(A) = P_(W) / (√3 * PF * V_L-L(V) ) ————–Line to Line voltage

Since the line voltage is the root 3 times of the phase voltage.

V_L-L(V) =√3 * V_L-N(V) 

Look at the above AC Amp formula, the current is depending on the power factor, voltage. Hence by changing voltage and power we can change the current.

Watts to Amp conversion Chart:

The Amps rating is calculated for single-phase and DC.