PHYSICS & ENGINEERING
Electricity & Magnetism
Ohm's Law Calculator
Solve V = IR for any variable and derive power with P = VI.
Resistor Color Code Calculator
Decode resistor color bands to resistance and tolerance for 4- and 5-band resistors, or find the color code for any resistance value.
RC Circuit Time Constant Calculator
Calculate an RC circuit's time constant τ = RC, cutoff frequency, capacitor voltage at any time and the time to charge or discharge to a target.