B6
Reviewed for accuracy · Maintained by Justin Evans
B6 highlighted — use the view toggle to see all 88 keys.
Piano key
75 of 88
Octave
6
Frequency
1975.53 Hz
MIDI number
95
Key color
White key
Pitch class
B · Cb · A##
What is B6?
B6 is the B in octave 6 — the 75th key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 1975.53 Hz. It sits 35 half-steps above middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count up from middle C (C4) 2 octaves to reach octave 6, then step to B.
Every octave doubles the frequency: the B one octave up sounds at 3951.06 Hz and the one below at 987.77 Hz. The same piano key can be written as B, Cb, A## depending on the musical context — same sound, different spelling.
Nearby notes
Every B on the keyboard: