6 calculators in this category
- Ohm's Law CalculatorOhm's law and Joule's law (IEEE Std 280 quantity symbols)Pick the two quantities you already know — any two of voltage, current, resistance and power — and this calculator returns the…
- Electrical Power CalculatorIEEE Std 1459-2010 power quantity definitionsThis calculator separates the three numbers people routinely confuse: watts, volt-amperes and volt-amperes reactive. Give it a…
- Series Resistance CalculatorKirchhoff's voltage lawResistors end to end simply add: the total resistance of a series chain is the sum of its parts. This calculator takes up to…
- Parallel Resistance CalculatorKirchhoff's current lawEnter up to six resistor values and this calculator returns the equivalent resistance of the parallel combination, the current…
- Voltage Divider CalculatorKirchhoff's voltage law and Thévenin's theoremA two-resistor divider turns an input voltage into a smaller one, and this calculator gives you every number you need to use it…
- Current Divider CalculatorKirchhoff's current law and Ohm's lawEnter the current arriving at a parallel node and the resistance of each branch, and this calculator shows how that current…
Which one do you need?
- Ohm's Law Calculator
- Solve Ohm's law for voltage, current, resistance or power from any two known values, with every step shown and resistor wattage guidance included.
- Electrical Power Calculator
- Calculate real power in watts, apparent power in VA and reactive power in VAR from voltage, current, resistance and power factor for DC or 1-phase AC.
- Series Resistance Calculator
- Add up to six resistors in series to get total resistance, circuit current, and the voltage drop and power in each resistor, with the arithmetic shown.
- Parallel Resistance Calculator
- Find the equivalent resistance of up to six resistors in parallel, plus the current and power in every branch, with the reciprocal arithmetic shown.
- Voltage Divider Calculator
- Compute a two-resistor divider's output voltage with or without a load, the current it draws, the power in each resistor, and the R2 for a target output.
- Current Divider Calculator
- Split a total current between parallel branches with the current divider rule. Get each branch current, the equivalent resistance and the node voltage.