Bandwidth Calculator

Calculate the bandwidth or selectivity of a resonator with the Bandwidth Calculator, and learn how with the integrated live example

The formula to calculate bandwidth is:


BW = Bandwidth in cycles per second*
f = Frequency in cycles per second*
Q = Q Factor

*The bandwidth can be calculated using any frequency unit that’s convenient, but keep in mind that the bandwidth will always be in the same unit that you use for the frequency.

Example: Calculate the bandwidth of a coil that resonates at 1360000 cycles/sec and has a Q factor of 460

BW=\frac{1360000}{460}=2,956.522\; Cycles/sec


BW=\frac{1360}{460}=2.957\; kc

Enter the Resonant Frequency and Q Factor

How To Calculate Bandwidth

Enter some values to get started!

Using the Bandwidth Calculator

Frequency: Enter the resonant frequency

Q Factor: Enter the Q Factor

How To Calculate Bandwidth: This feature displays a live example of how to calculate bandwidth using the figures that you enter

The result is calculated and updated automatically as you enter different numbers or change between the input fields. If the calculated result hasn’t updated after you’ve finished entering your values, click or tap on the result.

Reference: Wikipedia