MeasureZone

Electrical measurement tools

Electrical calculators apply Ohm’s law (V = IR), power (P = VI), kilowatt-hour cost, and simple battery-life estimates. They are for education and rough planning. High-voltage work requires a licensed electrician and local code.

Electrical calculators

CalculatorOhm’s Law CalculatorSolve voltage, current, resistance, or power from any two known values.CalculatorWattage CalculatorCalculate electrical power from voltage and current, with optional power factor.CalculatorAmp to Watt CalculatorConvert amps to watts at a stated voltage (and the reverse).CalculatorkWh Cost CalculatorEstimate electricity cost from watts, hours of use, and price per kWh.CalculatorBattery Life CalculatorEstimate runtime from battery capacity in mAh or Wh and load current or watts.