Updated
Electrical
Amps To Watts Calculator
Convert current (A) to power (W) using voltage for DC, single-phase AC, or three-phase AC. Include power factor and efficiency, compare real vs apparent power, and estimate kWh and cost.
Convert Amps to Watts with Voltage, Power Factor and Efficiency
Choose DC or AC, enter volts and amps, then view watts, VA, reactive power, and energy/cost estimates in the format you prefer.
For AC loads, PF converts apparent power (VA) into real power (W). Efficiency is applied to estimate output power from input power.
If you enter output power (like motor output), the calculator estimates input watts using efficiency before solving amps.
This tab estimates energy and cost from amps. Convert to watts first, then kWh from operating time. For cycling appliances, use realistic average run time.
Quick unit conversions for amps, volts and watts. Use this to sanity-check values before switching back to the main calculation tabs.