RC Circuit Calculator
Free calculate time constant, charging and discharging behavior of resistor-capacitor circuits. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
V
Time after charging/discharging starts
Results
Enter parameters to calculate
RC Circuit Formulas
Time Constant (τ)
τ = R × C
Time to reach 63.2% of final voltage
Charging Voltage
V(t) = Vₛ(1 - e^(-t/τ))
Discharging Voltage
V(t) = V₀ × e^(-t/τ)
V₀ = initial voltage
Charging Progress
1τ: 63.2%, 2τ: 86.5%, 3τ: 95.0%, 5τ: 99.3%