W  
V  
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DC Watts to Amps calculation 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)} 
AC Single Phase Watts to Amps calculation The phase current I in amps (A) is equal to the power P in watts (W) divided by PF times the RMS voltage V in volts (V): I_{(A)} = P_{(W)} / (PF * V_{(V)}) The power factor of resistive impededance load is equal to 1. 
AC Three Phase Watts to Amps calculation Calculation with line to line voltage The phase current I in amps (A) is equal to the power P in watts (W) divided by the square root of 3 times the power factor PF times the line to line RMS voltage V_{LL} in volts (V): I_{(A)} = P_{(W)} / (√3 * PF * V_{LL(V)}) The power factor of resistive impedance load is equal to 1. Calculation with line to neutral voltage 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 th line to neutral RMS voltage V_{LN} in volts (V): I_{(A)} = P_{(W)} / (3 * PF * V_{LN(V)}) The power factor of resistive impedance load is equal to 1. 
Common power factor values NOTE: It is NOT recommended to use common power factor values for accurate results.


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