The C♭ Note

C♭ is a white key on the piano. It sounds at 246.94 Hz in octave 4.

C♭ on the piano

Press play to hear the note.

Key facts

On the keyboard
a white key on the piano.
Frequency (octave 4)
246.94 Hz
MIDI number (octave 4)
59
Also written as
B
In key signatures
The 6 flat in the order of flats.

C♭ and its enharmonic spellings

C♭ can also be written as B. These are enharmonic equivalents: the same pitch, the same key on the piano, a different name on the page. Which spelling is correct depends on the key and on how the note functions, not on the sound.

C♭ frequency in every octave

Frequencies for C♭ in scientific pitch notation, with A4 tuned to 440 Hz.

NoteMIDIFrequency
C♭12330.87 Hz
C♭23561.74 Hz
C♭347123.47 Hz
C♭459246.94 Hz
C♭571493.88 Hz
C♭683987.77 Hz
C♭7951975.53 Hz

Chords on C♭

The most common chords built with C♭ as the root.

See every C♭ chord

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Scales starting on C♭

Keys and scales that use C♭ as their tonic.

All notes

Veelgestelde vragen

Where is C♭ on the piano?

C♭ is a white key on the piano.

What frequency is C♭4?

C♭4 sounds at 246.94 Hz with A4 tuned to 440 Hz.

What is another name for C♭?

C♭ can also be written as B. They are the same pitch spelled differently.