Amps to Watts Calculator
Calculate active power from current and voltage for DC and AC systems.
Result
—Formula
P = V × I (DC); P = V × I × PF (single-phase); P = √3 × V_LL × I × PF (three-phase).
Worked example
For balanced three-phase AC, V is line-to-line voltage and I is line current.
Assumptions
For three-phase calculations, the load is assumed balanced, voltage is line-to-line, and current is line current. Power factor applies to AC active-power calculations.
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Technical disclaimer
This calculator is for numerical estimation only. It does not provide wire, breaker, protection, electrical-code, or installation recommendations.