List the frequencies of all twelve notes in any octave.
Starting from the C of the chosen octave, every black or white key is a fixed twelfth-root-of-two step higher. A complete note-to-hertz table is a quick reference for tuning synths, checking samples and arranging by ear.
Octave Note Frequencies
Each note in the octave is the previous times 2^(1/12)
Each note in the octave is the previous times 2^(1/12) Starting from the C of the chosen octave, every black or white key is a fixed twelfth-root-of-two step higher.
A complete note-to-hertz table is a quick reference for tuning synths, checking samples and arranging by ear.
This calculator takes 2 inputs: Octave number, A4 tuning. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.