RC Circuit Time Constant Calculator - Engineering Calculator Box

RC Circuit Basics:
Time constant τ = R × C (in seconds)
At t = τ: ~63.2% of final value
At t = 5τ: ~99.3% of final value

Resistance (Ω)

Capacitance (μF)

Supply Voltage (V)

Time Point (s) Time from start of charging

Circuit Type

Enter RC circuit parameters to calculate time response.