The B Note

B is a black key, immediately next to B. It sounds at 466.16 Hz in octave 4.

B on the piano

Press play to hear the note.

Key facts

On the keyboard
a black key, immediately next to B.
Frequency (octave 4)
466.16 Hz
MIDI number (octave 4)
70
Also written as
Ais
In key signatures
The 1 flat in the order of flats.

B and its enharmonic spellings

B can also be written as Ais. 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.

B frequency in every octave

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

NoteMIDIFrequency
B13458.27 Hz
B246116.54 Hz
B358233.08 Hz
B470466.16 Hz
B582932.33 Hz
B6941864.66 Hz
B71063729.31 Hz

Chords on B

The most common chords built with B as the root.

See every B chord

Piano Companion
Piano Companion
Chords, Scales & Progressions

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Scales starting on B

Keys and scales that use B as their tonic.

All notes

Gyakran ismételt kérdések

Where is B on the piano?

B is a black key, immediately next to B.

What frequency is B4?

B4 sounds at 466.16 Hz with A4 tuned to 440 Hz.

What is another name for B?

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