Category
circuits calculators
Solve common circuits problems with unit-aware steps.
Ohm's Law Calculator
Enter any two independent voltage, current, resistance, or power values to solve the complete DC resistor state; extra inputs are checked for consistency.
Electric Power Calculator
Enter any two independent voltage, current, resistance, or power values to solve the complete DC resistor state; extra inputs are checked for consistency.
Voltage Divider Calculator
Solve an unloaded two-resistor voltage divider.
LED Resistor Calculator
Calculate a series resistor from supply voltage, LED forward voltage, and target current.
Series Resistance Calculator
Add two series resistors or solve either resistor value.
Parallel Resistance Calculator
Calculate the equivalent resistance of two parallel resistors.
RC, RL and RLC Calculator
Analyze series RC, RL, and RLC circuits with complex impedance, phase, RMS current and component voltages, time constants or resonance metrics, analytic -3 dB cutoffs, and a logarithmic frequency sweep.