F-flat major
| Relative key | D-flat minor →enharmonic: C-sharp minor | 
|---|---|
| Parallel key | F-flat minor →enharmonic: E minor | 
| Dominant key | C-flat major | 
| Subdominant key | B-double flat major →enharmonic: A major | 
| Enharmonic key | E major | 
| Component pitches | |
| F♭, G♭, A♭, B, C♭, D♭, E♭ | |
F-flat major (or the key of F-flat) is a key based on F♭, consisting of the pitches F♭, G♭, A♭, B♭♭, C♭, D♭, and E♭. Its key signature has eight flats, requiring one double flat and six single flats. Because F-flat major requires eight flats, including a B, it is almost always notated as its enharmonic equivalent of E major, with four sharps. The same is true of the relative minor of D-flat minor, usually replaced by C-sharp minor. F-flat minor, the parallel minor, would be replaced by E minor, since F-flat minor requires four double-flats.
The F-flat major scale is:
Changes needed for the melodic and harmonic versions of the scale are written in with accidentals as necessary. The F-flat harmonic major and melodic major scales are:
The scale-degree chords of F-flat major are:
- Tonic – F-flat major
- Supertonic – G-flat minor
- Mediant – A-flat minor
- Subdominant – B-double-flat major
- Dominant – C-flat major
- Submediant – D-flat minor
- Leading-tone – E-flat diminished