Bb dominant 7th chord on piano
The Bb dominant 7th chord is Bb–D–F–Ab. It's the same chord as A#: one sound, two spellings. Tap the keys below to hear it.
Bb7Bb · D · F · Ab
Tap the keys to hear them
Bb7 is the V7 of Eb and the I7 of a Bb blues, where it does not resolve at all and simply IS the sound. Horn-key jazz lives here.
How the Bb dominant 7th chord is built
A# is the same chord. Which spelling a piece uses depends on its key signature. On the keyboard, the keys you press are identical.
Fingerings & inversions
Standard fingerings use the thumb (1), the little finger (5), and either the index (2) or middle finger (3). Hand size and musical context change what feels natural. Switch Fingers on above to see 1-2-3-5 land for Bb7.
| Position | Notes (bottom → top) | Right hand | Left hand |
|---|---|---|---|
| Root position | Bb – D – F – Ab | 1-2-3-5 | 5-3-2-1 |
| 1st inversion | D – F – Ab – Bb | 1-2-4-5 | 5-4-2-1 |
| 2nd inversion | F – Ab – Bb – D | 1-2-3-5 | 5-3-2-1 |
| 3rd inversion | Ab – Bb – D – F | 1-2-4-5 | 5-3-2-1 |
Inversion diagrams
The inversion buttons above play all 4 shapes of Bb7.
Where Bb7 shows up
Bb7 is the dominant seventh of Eb major. When a song in Eb wants a strong arrival, Bb7 is the chord that comes right before it, and its Ab is the note leaning hardest.
Hear it drive a 12-bar blues in Bb: Bb7–Eb7–F7.
Common questions
What notes are in the Bb dominant 7th chord?
The Bb dominant 7th chord is made up of Bb, D, F, Ab. Bb is the black key between A and B, and starting the chord there shifts the whole hand slightly back on the keyboard.
What fingers should I use to play Bb7 on piano?
In root position, the standard fingering is 1-2-3-5 in the right hand and 5-3-2-1 in the left hand (1 = thumb, 5 = little finger). Bb and Ab keep the hand up on the black keys, with D and F in between, so let the fingers sit deep in the cluster for a secure reach.
Is Bb dominant 7th the same as A#?
Yes, the keys you press are identical and the sound is the same. This is known as enharmonic equivalents. Sheet music in flat keys writes Bb dominant 7th, while sharp-key contexts spell the same sound A#. In print and in search, Bb dominant 7th is by far the more common of the two.
What's the difference between Bb7 and Bbmaj7?
Bb7 has a minor 7th on top, Ab, which makes it sound restless and ready to resolve. Bbmaj7 raises that note a half step, which sounds settled and warm instead. Same Bb–D–F triad underneath, one note apart, very different jobs.
More Bb chords
Reviewed by
Composer, arranger and music educator. BA Music (LIPA), MA Composition (University of Salford).
Last updated 2026-08-19