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Browse 8 power tools. Opening Watts to Amps.

  • Watts to AmpsConvert electrical power (watts) to current (amps) at a given voltage.Use this to check a device won't overload your circuit or blow a fuse.
  • Amps to WattsConvert current (amps) and voltage into power (watts).Use this to figure out how much power your gear draws and what it costs to run.
  • Residential AC Voltage Drop CalculatorCalculate AC voltage drop in home wiring from supply voltage, amps, cable length (m), and AWG or mm² copper size.Use this to make sure far-away outlets still deliver full voltage to your devices.
  • Ohm's Law CalculatorFind voltage, current, or resistance when you know any two values (V = I × R).Use this to fill in the missing electrical value for any circuit you're working on.
  • Volts to Watts CalculatorConvert voltage and current into electrical power in watts.Use this to work out the real power of any device from its label values.
  • Watts to Volts CalculatorFind voltage from power and current (V = W ÷ A).Use this to check what voltage your setup needs to deliver the power you want.
  • Power Factor CalculatorCalculate power factor from real power (kW) and apparent power (kVA).Use this to see how efficiently your equipment uses power and avoid utility penalties.
  • AC Inrush Current Limit CalculatorFind nominal amps, peak motor inrush, and recommended breaker size with B/C/D curve guidance.Use this to pick a breaker that won't trip every time your motor starts.

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