FFT spectrum frequency resolution calculator

Calculate the frequency resolution of a FFT spectrum using this online calculator - formula included.

[to-calculator-info][/to-calculator-info][calculator] [calculator-input name=“sz” label=“FFT size” unit=“points”][/calculator-input] [calculator-input name=“samplerate” label=“samplerate” unit=“Hz”][/calculator-input] [calculator-expression name=“resolution” formula=“samplerate/sz” unit=“Hz per bin”] [calculator-output name=“FFT frequency resolution” unit=“Hz/bin”]A <%= sz %>-point FFT of data with a samplerate of <%= format(samplerate, “Hz”) %> has a frequency resolution of <%= formatFloat(resolution, “Hz per bin”) %> (= <%= format(resolution, “Hz per bin”) %>). [/calculator-output]

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$$f_{resolution} = \frac{f_{samplerate}}{N_{FFT}}$$