Passive Filter Calculator

Cutoff Freq
1.59 kHz
RC Low-Pass FilterVinR1.00 kΩVoutC100.00 nF
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• Blue line: Magnitude response (dB)

• Red line: Phase response (degrees)

• Green dashed: Cutoff/center frequency

• Red dashed: -3dB level

Show formulas

RC Low-Pass Filter

fc=12πRCf_c = \frac{1}{2\pi RC}
H(jω)=11+jωRCH(j\omega) = \frac{1}{1 + j\omega RC}
∣H∣=11+(f/fc)2,∠H=−arctan⁡(f/fc)|H| = \frac{1}{\sqrt{1 + (f/f_c)^2}}, \quad \angle H = -\arctan(f/f_c)