C music note
C note in treble clef
Here is a C note on a staff

The treble clef set the position of the G note on the second line from the bottom, so a C note can be written with one ledger line below the staff.
C note in bass clef
Here is a C note on a staff with a bass clef:

The bass clef set the position of the F note on the fourth line from the bottom, so a C note can be written on the second space of the staff (from the bottom).
C music note on a piano keyboard
Here are some C notes on a piano keyboard:
how to find the C note on a piano keyboard?
It's very simple! Do you see the black keys? There are two black keys, then three, then two, then three, and so on. The keys for C are just before the first of the two black keys.
The note C as tonic
The C note is the first music note (the tonic) of the C major scale and of the C minor scale:
C major scale

C minor scales
Remember that there are four kinds of minor scales:
C natural minor scale:

C harmonic minor scale

C ascending melodic minor scale

C descending melodic minor scale

The C note as leading tone (leading note)
The C note is the leading tone

Frequency in Hertz of the C note (C4)
The scientific pitch notation (also known as American standard pitch notation) symbolizes the following C note as C4:
Depending on the tuning of the musical note A (A4) and in an equal-tempered scale, the frequency of the note C may vary:
If A4 = 440 Hertz: this C note (C4) has a frequency of 261.63 Hz
If A4 = 442 Hertz: this C note (C4) has a frequency of 262.81 Hz
Note: These frequency values in Hertz are valid only for the equal temperament. In other words, these frequencies correspond to the notes on a well-tuned piano.
The C note with different clefs
Obviously, there are several C notes spread out over many octaves. Here are some C notes in different clefs:
Some C notes with a treble clef (G clef)
Here are some C notes with a treble clef:
Some C notes with a bass clef
Here are some C notes with a bass clef:
Some C notes with a tenor clef
Here are some C notes with a tenor clef:
Some C notes with an alto clef
Here are some C notes with an alto clef:
Some C notes with a mezzo-soprano clef
Here are some C notes with a mezzo-soprano clef:
Some C notes with a soprano clef
Here are some C notes with a soprano clef:
Some C notes with a baritone clef
Here are some C notes with a baritone clef:
Scales starting with a C note
Here are all major scales and all minor scales starting with a C note:
C major scale:

C natural minor scale:

C harmonic minor scale:

C ascending melodic minor scale:

C descending melodic minor scale:

Enharmonic equivalents
Here are the enharmonic notes of C:
Notes:
- Enharmonic notes are notes that have the same pitch but not the same name.
- B sharp is enharmonic to C because the sharp raises the pitch by one half step
(semitone ), and because there is only one half step between B and C. - D double flat is enharmonic to C because the double flat lowers the pitch by two half steps and because there are two half steps between C and D.
The note C and accidentals
Here are all the possible accidentals you can find with the note C and their positions on a piano keyboard: