RC Time Constant Calculator

Calculate the RC time constant and transient voltage from resistance and capacitance.

Formula

τ = R·C; V(t) = Vf + (V0 − Vf)e^(−t/τ)

Source / method note

Uses τ = R·C and the exponential response equation for an ideal first-order RC circuit.

Legal / official rate note

Source resistance, leakage, ESR, and measurement loading can change real-circuit behavior.

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