Scale degrees · F♯ major
The 4 of F♯ is B
The 4 (four) of F♯ (F sharp, F#) is B: a perfect fourth above the root.
F♯ — the root, 1B — the 4
How to find it
Count letters first, the root included: F, G, A, B. A 4th lands on B.
Then the sound: a perfect fourth is 5 semitones above F♯, which is exactly where B is — no sharp or flat needed.
Where you meet it
The 4 sits a half step above the major 3rd. In a sus chord it takes the 3rd's place; an octave up it is the 11.
In F♯sus4:
F♯ · B · C♯
The 4 in every key
| Key | The 4 |
|---|---|
| C | F |
| G | C |
| D | G |
| A | D |
| E | A |
| B | E |
| F♯ | B |
| D♭ | G♭ |
| A♭ | D♭ |
| E♭ | A♭ |
| B♭ | E♭ |
| F | B♭ |
Every degree of F♯
Free on iPhone and Android
Name it before
you can count it.
Improvy trains every degree in all 12 keys — the 3, the ♭7, the ♯11 — until you see the note without working it out. A few minutes a day. Free to start; Pro is one payment, never a subscription.
Or try the 60-second test in your browser