Designing a signal filter doesn’t have to involve complex calculus. This RC Filter Cutoff Frequency Calculator helps you determine the point where your signal begins to attenuate. Whether you are building an audio crossover or cleaning up sensor noise, finding the correct -3dB point is the first step.
RC Filter Cutoff Calculator
The -3dB Point: At this frequency (fc), the output power is half of the input power. The formula used is :
Tolerance: Standard capacitors often have a ±10% or even ±20% tolerance. For precision filters, use Polypropylene or C0G/NP0 ceramic capacitors for better accuracy.