Filter Calculator: Electronics

Design, calculate, and analyze analog electronic filters with a powerful collection of engineering tools.

Filter Calculator: Electronics helps engineers, technicians, students, and electronics hobbyists design active and passive filters, calculate component values, visualize frequency response, and refine circuit performance.

Whether you're designing an audio crossover, building an active filter, or studying analog electronics, the app provides practical tools for real-world circuit design.

ANALOG FILTER DESIGN

Design and calculate a wide range of electronic filters:

• RC low-pass and high-pass filters
• RL low-pass and high-pass filters
• RLC band-pass and band-stop filters
• Sallen-Key active filters
• Multiple-feedback (MFB) filters
• Butterworth filter designs
• Chebyshev filter designs
• Elliptic and Cauer filters
• Twin-T notch filters
• State-variable biquad filters
• Passive speaker crossover networks
• Parametric audio equalizers
• Low-shelf and high-shelf filters
• All-pass phase shifters

FREQUENCY RESPONSE ANALYSIS

Explore filter behavior with practical analysis tools:

• Magnitude and phase response plots
• Cutoff and center frequency calculations
• Resonance frequency and quality factor (Q)
• Bandwidth and impedance calculations
• Component value calculations
• Ideal and standard-component response comparisons for supported designs

ADVANCED FILTER SYNTHESIS

Design filters from performance requirements instead of calculating every component manually.

• Specification-driven filter synthesis
• Preferred resistor and capacitor values
• Standard component series selection
• Component tolerance analysis
• Save and revisit filter designs
• Export bill of materials (BOM) as CSV
• Copy SPICE netlists for supported designs

ELECTRONICS COMPONENT CALCULATORS

Access useful tools for everyday electronics projects:

• Series and parallel resistor calculators
• Series and parallel capacitor calculators
• Capacitive and inductive reactance
• RLC circuit calculations
• Resistor color code decoder
• SMD resistor and capacitor code decoders
• Single-layer and multilayer air-core coil calculators

BUILT FOR PRACTICAL ELECTRONICS WORK

• Search tools quickly
• Save frequently used tools as favorites
• Access recently used calculators
• Work with preferred component values
• Analyze designs before choosing physical components

WHO IS IT FOR?

Filter Calculator is designed for:

• Electronics engineers and technicians
• Audio circuit designers and enthusiasts
• Electrical and electronics engineering students
• DIY electronics hobbyists
• Educators and laboratory users

From simple RC networks to advanced active filter designs, Filter Calculator brings essential analog filter calculations, synthesis, and response analysis together in one convenient app.

Some advanced features require a Pro unlock. Results are based on circuit models and assumptions. Always verify component ratings, tolerances, and performance before constructing physical circuits.