Music Notes Frequency Reference
Note and frequency comparison table, 12-tone equal temperament reference.
Basics
Standard Pitch
A4 = 440 HzInternational standard pitch
Octave Relation
Freq. ×2One octave higher, frequency doubles
Semitone Relation
Freq. × 2^(1/12)Ratio between adjacent semitones ≈ 1.0595
Equal Temperament (12-TET)
2^(n/12)n = number of semitones
Octave 3
C3
Do
130.81 Hz
C#3/Db3
-
138.59 Hz
D3
Re
146.83 Hz
D#3/Eb3
-
155.56 Hz
E3
Mi
164.81 Hz
F3
Fa
174.61 Hz
F#3/Gb3
-
185 Hz
G3
Sol
196 Hz
G#3/Ab3
-
207.65 Hz
A3
La
220 Hz
A#3/Bb3
-
233.08 Hz
B3
Si
246.94 Hz
Octave 4
C4
Do
261.63 Hz
C#4/Db4
-
277.18 Hz
D4
Re
293.66 Hz
D#4/Eb4
-
311.13 Hz
E4
Mi
329.63 Hz
F4
Fa
349.23 Hz
F#4/Gb4
-
369.99 Hz
G4
Sol
392 Hz
G#4/Ab4
-
415.3 Hz
A4
La
440 Hz
A#4/Bb4
-
466.16 Hz
B4
Si
493.88 Hz
Octave 5
C5
Do
523.25 Hz
C#5/Db5
-
554.37 Hz
D5
Re
587.33 Hz
D#5/Eb5
-
622.25 Hz
E5
Mi
659.25 Hz
F5
Fa
698.46 Hz
F#5/Gb5
-
739.99 Hz
G5
Sol
783.99 Hz
G#5/Ab5
-
830.61 Hz
A5
La
880 Hz
A#5/Bb5
-
932.33 Hz
B5
Si
987.77 Hz