RC Low-Pass Filter Calculator

Design passive RC filters. Calculate cutoff frequency, attenuation, and phase shift.

Resistance R (Ω)

Capacitance C (μF)

Input Voltage V_in (V)

Input Frequency (Hz)

Load Resistance R_L (Ω)

Rise Time t_r (ms)

Cutoff: f_c = 1/(2πRC)

Time Constant: τ = RC

Gain: |H| = 1/√(1+(2πfRC)²)