Note frequency chart
Free · no sign-up · runs in your browser, nothing is uploaded
How to use it
- Find the note in the table, or type it in the search box (like A#3 or 261).
- Change A4 if you tune to something other than 440 Hz.
- Click a frequency to hear it.
About this tool
The frequency in hertz of every note from C0 to B8. Great for EQ (cut or boost right on a note), tuning 808s and bass, and sound design. Change A4 for other tunings, search for a note or a frequency, and click any cell to hear it.
Questions
What frequency is middle C?
Middle C (C4) is about 261.63 Hz when A4 is 440 Hz.
What frequency is A4?
A4 is the tuning standard, usually 440 Hz. Some musicians use 432 or 442 Hz.
How do I find which note a frequency is?
Type the frequency in the search box. It shows the closest note and how many cents away it is.
How are the frequencies calculated?
Each semitone is the twelfth root of 2 (about 1.0595) times the one below, starting from A4.
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