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Note Frequencies

Here is a table giving the frequencies in Hz of musical pitches, covering the full range of all normal musical instruments I know of and then some. It uses an even tempered scale with A = 440 Hz.


The octave number is in the left column so to find the frequency of middle C which is C4, look down the "C" column til you get to the "4" row : so middle C is 261.6 Hz.

Note Frequency Calculator and Player

Here is a utility courtesy of Colin Crawley which will calculate the frequencies of notes and can handle tunings other than A = 440Hz.

It can also play the notes, so is useful as a tuning note reference.

It works on Windows and Linux. Playing notes may not work on Safari on the Mac, though Firefox or Chrome on the Mac is ok.

Some Specific Notes

Middle C is C4=261.6Hz

Standard tuning fork A is A4=440Hz

Piano range is A0=27.50Hz to C8=4186Hz

Guitar strings are E2=82.41Hz, A2=110Hz, D3=146.8Hz, G3=196Hz, B3=246.9Hz, E4=329.6Hz

Bass strings are (5th string) B0=30.87Hz, (4th string) E1=41.20Hz, A1=55Hz, D2=73.42Hz, G2=98Hz

Mandolin & violin strings are G3=196Hz, D4=293.7Hz, A4=440Hz, E5=659.3Hz

Viola & tenor banjo strings are C3=130.8Hz, G3=196Hz, D4=293.7Hz, A4=440Hz

Cello strings are C2=65.41Hz, G2=98Hz, D3=146.8Hz, A3=220Hz


Bear in mind that everything here is in relation to the even tempered (aka equal tempered) scale, where an octave is a frequency ratio of exactly two and a semitone is a frequency ratio of exactly the twelfth root of two. In the real world however many different temperaments may be used - see - and octaves too can vary in size, see

Also we call middle C "C4" : this is the commonest octave numbering but some people call middle C "C3" or even "C5".

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