The B♯ Note
B♯ is a white key on the piano. It sounds at 523.25 Hz in octave 4.
B♯ on the piano
Key facts
- On the keyboard
- a white key on the piano.
- Frequency (octave 4)
- 523.25 Hz
- MIDI number (octave 4)
- 72
- Also written as
- C
- In key signatures
- The 7 sharp in the order of sharps.
B♯ and its enharmonic spellings
B♯ can also be written as C. 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.
| Note | MIDI | Frequency |
|---|---|---|
| B♯1 | 36 | 65.41 Hz |
| B♯2 | 48 | 130.81 Hz |
| B♯3 | 60 | 261.63 Hz |
| B♯4 | 72 | 523.25 Hz |
| B♯5 | 84 | 1046.5 Hz |
| B♯6 | 96 | 2093 Hz |
| B♯7 | 108 | 4186.01 Hz |
Chords on B♯
The most common chords built with B♯ as the root.
All notes
Ofte stilte spørsmål
Where is B♯ on the piano?
B♯ is a white key on the piano.
What frequency is B♯4?
B♯4 sounds at 523.25 Hz with A4 tuned to 440 Hz.
What is another name for B♯?
B♯ can also be written as C. They are the same pitch spelled differently.
