electrical

RC Circuit

Time constant τ = RC, cutoff frequency, and charge/discharge timing.

Inputs

Resistance R

Capacitance C

Enter capacitance in base units (F).
1 µF = 1e-6 · 1 nF = 1e-9 · 1 pF = 1e-12

Results

Time Constant τ = RC—

Cutoff Freq f = 1/(2πRC)—

63.2% Charge time—

τ = RC · f꜀ = 1/(2πτ) · t₆₃ = τ