Spectral Selection width in kHz?

Audacity 3 Help Forum Windows
1

I need to be able to measure the difference between the highest and lowest frequency in a selection. I have been selecting an area on the spectrogram and then using a calculator to get the difference. The option in the spectral selection toolbar for “center frequency and width” shows the width in octaves, but there is no option for Hz/kHz. Is there a plugin available that can do this, or any way around this? I have to do this hundreds of times, so it would save some calculation if it just displayed the difference between top and bottom of the selection in Hz or kHz.

Here’s an example of what I’m looking at:
Capture.JPG

2

There’s an option for “Low and High Frequencies”.

Alternatively, you could get the width in kHz by running this code in the Nyquist Prompt effect:

;version 4
(* 0.001
  (- (get '*selection* 'high-hz)
     (get '*selection* 'low-hz)))