Quick guide
Try an example
You enter
- Note and octave
A5
- A4 tuning reference (Hz)
440
You get
880 Hz
How it works and limits
Use note names such as C4, F#4 or Bb3. The calculation uses twelve-tone equal temperament and your chosen A4 reference.
Convert a musical note and octave to a frequency in hertz.
Numbers StatelessA5
440
880 Hz
Use note names such as C4, F#4 or Bb3. The calculation uses twelve-tone equal temperament and your chosen A4 reference.