http://www.ozvalveamps.org/notefreq.htm | Last update: 17:17 03/11/06
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Musical Note Frequencies

Corrected: 2/7/06, 3/11/06
Reference A = 440.00Hz
{middle-C} = 261.63Hz
A     27.50   b55.00  g110.00   220.00   440.00   880.00  1760.00  3520.00
A#/Bb 29.14    58.27   116.54   233.08   466.16   932.33  1864.66  3729.31
B     30.87    61.74   123.47  g246.94   493.88   987.77  1975.53  3951.07
C     32.70    65.41   130.81  {261.63}  523.25  1046.50  2093.00  4186.01
C#/Db 34.65    69.30   138.59   277.18   554.37  1108.73  2217.46  4434.92
D     36.71   b73.42  g146.83   293.66   587.33  1174.66  2349.32  4698.64
D#/Eb 38.89    77.78   155.56   311.13   622.25  1244.51  2489.02  4978.03
E    b41.20   g82.41   164.81  g329.63   659.26  1318.51  2637.02  5274.04
F     43.65    87.31   174.61   349.23   698.46  1396.91  2793.83  5587.65
F#/Gb 46.25    92.50   185.00   369.99   739.99  1479.98  2959.96  5919.91
G     49.00   b98.00  g196.00   392.00   783.99  1567.98  3135.96  6271.93
G#/Ab 51.91   103.83   207.65   415.30   830.61  1661.22  3322.44  6644.88

The low E on a four string bass guitar is 41.2Hz
The low E on a tenor guitar is 87.31Hz 82.41Hz


This table was generated from a BASIC programme using the “twelfth root of two” relation (twelve notes in an octave):

f = octave x 27.5 x 2(note/12)

Use these frequencies with a little caution. There is a musical consideration called temprament which applies particularly to pianos and organs.

To temper a piano tuning is to very slightly de-tune the notes for the best musical compromise for all the note relationships in every musical key.

A piano tuned with a frequency counter strictly following the table above will sound unexciting and somewhat sour in tune. This is the general problem of electronic keyboards that use a single master oscillator-divider tone source.

Tempering adjusts the degree of dissonance between the notes until a musically agreeable result is obtained in all musical keys.

It is possible for temprament to be set, or the tuning to “drop” to favor some musical keys over others.


AP Instrument Tuner v1.02 for your computer desktop (W95 okay).

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