Scale degrees · F♯ major
The 5 of F♯ is C♯
The 5 (five) of F♯ (F sharp, F#) is C♯ (C sharp): a perfect fifth above the root.
F♯ — the root, 1C♯ — the 5
How to find it
Count letters first, the root included: F, G, A, B, C. A 5th lands on C.
Then the sound: a perfect fifth is 7 semitones above F♯, and the C that is 7 semitones up is C♯.
That is why it is C♯ and not D♭: D♭ is the same key on the piano, but from F♯ it would be a 6th, not a 5th.
Where you meet it
The 5 is the most stable note after the root; a power chord is just the two of them.
In F♯5:
F♯ · C♯
The 5 in every key
| Key | The 5 |
|---|---|
| C | G |
| G | D |
| D | A |
| A | E |
| E | B |
| B | F♯ |
| F♯ | C♯ |
| D♭ | A♭ |
| A♭ | E♭ |
| E♭ | B♭ |
| B♭ | F |
| F | C |
Every degree of F♯
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