Beat Frequency Calculator

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Switch between finding the beat, reverse solving a frequency, or musical tuning in cents.
A reference tone, e.g. 440 Hz is concert A.
Hz
The other tone sounding at the same time.
Hz
Beat frequencySlow, countable beats
3Hz
Beat period0.333s
Average (perceived) frequency441.5Hz
3 Hz
In tune<0.5Slow beats0.5-7Fast flutter7-20Roughness20+

You hear 3 loudness pulses every second.

  • The beat frequency is the difference between the tones: |440 - 443| = 3 Hz.
  • Each full loud-soft cycle lasts about 0.333 seconds (the beat period, 1 divided by the beat frequency).
  • You still perceive a single pitch at the average, about 441.5 Hz, that throbs at the beat rate.

Next stepBring the two frequencies closer together to slow the beats, the basis of tuning an instrument by ear.

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