In this post, you'll learn the formulas to find amps from kW in dc, single phase ac, and three phase ac circuits.

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**DC Calculation formula**

**I(DC) = [kW * 1000] / E**

Calculate the current passing through 5 kW DC Motors having rated voltage of 40 V.

I = [kW * 1000] /E = 5000 / 40 = 125 A

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**Single Phase AC Calculation formula**

**I(1φ AC) = [kW * 1000] / [E * PF]**

Calculate the current passing through 2 kW, single phase ac motor having PF 0.8. Rated voltage is 220 V.

I = [kW * 1000] / [E * PF] = 2000 / [220 * 0.8] = 11.36 A

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**Three Phase AC Calculation formula**

**I(3φ AC) = [kW * 1000] / [E * PF]**

Calculate the current passing through 2.5 kW, three phase ac motor having PF 0.8. Rated voltage is 400 V.

I = [kW * 1000] / [E * PF] = 2500 / [400 * 0.8] = 7.8125 A

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