F♯ Dominant 7th Chord (F#7, Gb7) on Piano
The F#7 chord (F# dominant 7th) is built from 4 notes: F# – A# – C# – E. It is also written as Gb7.
Play these notes on a MIDI keyboard, your computer keyboard, or the on-screen keys and ChordKeys will name the chord back to you.
Notes and intervals
| Note | Degree | Interval from F# | Semitones |
|---|---|---|---|
| F# | 1 | root | 0 |
| A# | 3 | major 3rd | 4 |
| C# | 5 | perfect 5th | 7 |
| E | b7 | minor 7th | 10 |
Inversions
Rearranging which note sits at the bottom gives you 4 playable voicings of the same chord. Inversions let you move between chords with less hand movement.
| Voicing | Notes | Bass note |
|---|---|---|
| Root position | F# – A# – C# – E | F# in the bass |
| 1st inversion | A# – C# – E – F# | A# in the bass |
| 2nd inversion | C# – E – F# – A# | C# in the bass |
| 3rd inversion | E – F# – A# – C# | E in the bass |
How the dominant 7th chord is built
Every dominant 7th chord uses the same interval formula: 1 (0 semitones), 3 (4 semitones), 5 (7 semitones), b7 (10 semitones). Starting on F# and applying that formula produces F#, A#, C#, E. Learn the formula once and you can build a dominant 7th chord on any of the twelve roots.
Keys that contain F#7
Every note of F#7 belongs to these keys, so it will sit naturally in a progression written in any of them.
Other chords on F#
Dominant 7th chords on other roots
Frequently asked questions
What notes are in a F#7 chord?
A F#7 chord contains the notes F#, A#, C#, E. Those are the 1, 3, 5, b7 degrees measured from the root note F#.
How do you play F#7 on piano?
Place your thumb on F#, then add A# and C# and E above it. With a right hand in root position the common fingering is 1–2–3–5.
Is F#7 the same as Gb7?
Yes. F#7 and Gb7 are enharmonic equivalents — they sound identical and use the same piano keys. Which spelling you use depends on the key you are playing in.