Electrical & Energy
Power, current, voltage drop, batteries and solar. Explore 7 free online tools.
Watts to AmpsConvert power in watts to current in amps for DC and AC circuits.Amps to WattsConvert current in amps to power in watts for DC and AC circuits.Ohm's Law CalculatorCalculate voltage, current, resistance and power.Voltage Drop CalculatorEstimate the voltage drop in copper and aluminium cables.Battery Runtime CalculatorEstimate how long a battery can power a load.Electricity Cost CalculatorCalculate how much it costs to run an appliance.Solar Panel Output CalculatorEstimate the energy production of a solar PV system.