Electronic Filter Calculator

Design RC, RL, LC & active filters fast. Butterworth, Chebyshev, Bessel.

Filter Calculator Pro helps you design and analyze electronic filters in seconds. Quickly compute cutoff frequency, Q factor, gain-related parameters, and generate resistor, capacitor, and inductor values for common passive and active filter circuits.

Whether you’re designing audio filters, RF filter stages, or learning analog filter theory, this app provides a fast, practical workflow for engineers, technicians, students, and hobbyists.

Key Features

• Calculate filter parameters (cutoff frequency, Q, bandwidth, etc.)

• Calculate component values (R, C, L) from your design targets

• Built for quick iteration: enter your specs → get results instantly

Supported Filter Types

• RC filters: low-pass, high-pass

• RL filters: low-pass, high-pass

• LC filters: Butterworth, Chebyshev, Bessel responses

• Passive Butterworth / Chebyshev: 2–8 pole designs

• Active filters: Butterworth, Bessel, Chebyshev design

• Band-pass filters: pass a specific frequency band

• Notch filters: attenuate unwanted frequencies

• Passive crossover: basic loudspeaker crossover calculations

Ideal For

• Electronics engineers and technicians

• Students of electronics and electrical engineering

• Hobbyists building audio, RF, and general-purpose filters

• Anyone troubleshooting or optimizing analog filter circuits

Why Filter Calculator Pro?

Get accurate filter calculations quickly, reduce manual math, and learn filter behavior through real design examples.