The F Augmented 7th chord is a four-note chord made up of F, A, C♯, and E♭. It is built from a root, major third, augmented fifth, and minor seventh.
Construction
F Augmented 7th = Root + Major 3rd + Minor 6th + Minor 7th = F · A · C♯ · E♭
| Note | Interval | Degree |
|---|---|---|
| F | Root | 1 |
| A | Major 3rd | 3 |
| C♯ | Minor 6th | ♯5 |
| E♭ | Minor 7th | ♭7 |
F Augmented 7th Inversions
| Position | Notes |
|---|---|
| Root Position | F – A – C♯ – E♭ |
| 1st Inversion | A – C♯ – E♭ – F |
| 2nd Inversion | C♯ – E♭ – F – A |
| 3rd Inversion | E♭ – F – A – C♯ |
Key Signature
A Augmented 7th chord is built from symmetrical or ambiguous intervals, so it doesn’t belong to a single key and has no key signature of its own.
Same Notes, Other Names
The notes F – A – C♯ – E♭ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
F Augmented 7th — Frequently Asked Questions
What is the F Augmented 7th chord on piano?
The F Augmented 7th chord contains the notes F – A – C♯ – E♭. On piano, play these notes together to sound the chord.
What notes are in the F Augmented 7th chord?
The F Augmented 7th chord (F+7) contains four notes: F (root), A (major third), C# (augmented fifth), and Eb (minor seventh). It combines an augmented triad with a minor seventh.
How does F Augmented 7th differ from F Dominant 7th?
Both contain F, A, and Eb. F+7 has C# (augmented fifth) while F7 has C (perfect fifth). The raised fifth adds extra tension and upward chromatic pull.
How is F Augmented 7th used in music?
F+7 is an altered dominant resolving to Bb Major. The C# pulls up to D while Eb pulls down to D — converging on the third of Bb. Common in jazz, gospel, and R&B.
What genres use Augmented 7th chords?
Augmented 7th chords are common in jazz, gospel, blues, and R&B for adding colour to dominant resolutions.
What songs use Augmented 7th chords?
Augmented 7th chords appear in jazz standards and gospel. F+7 resolves to Bb Major, a common key for jazz and brass music.
What is the difference between +7 and 7#5?
They are the same chord. F+7, F7#5, and Faug7 all refer to F Augmented 7th.