B7 on the piano is a dominant 7th chord made from B, D#, F#, A. On piano it is played from the keys B, D#, F#, A, root position first, then in inversions. Below you will find its notes and intervals, every usable voicing on the piano, the common mistakes players make with it and the keys and progressions where it belongs.
What notes are in the B7 chord?
The B7 chord is a dominant 7th chord, and its notes are fixed: B, D#, F#, A. Every voicing on every instrument uses these same notes, in some order and in some octave — change one of them and you are playing a different chord. The table below lists each note with its interval from the root B, so you can see the structure of B7 at a glance. On the piano, the root-position keys B, D#, F#, A show B7 most clearly.
| Note | Interval |
|---|---|
| B | Root |
| D# | 3 |
| F# | 5 |
| A | b7 |
The root is B, the note the chord is named after and the note your ear hears as home. Above it, the intervals in B7 are 3, 5, b7. Those intervals are the fingerprint of the dominant 7th quality — any chord with the same interval pattern, on any root, is the same kind of chord. On the piano, the notes appear in the order the fingering dictates, but the set of notes never changes.
B7 sounds bluesy and restless — the flattened 7th ({flat7}) pulls the chord forward and makes it want to resolve. The colour is strongest when all the notes ring clearly. A muted chord tone, especially the 3rd or the 7th where the chord has one, flattens the character of B7 noticeably. On the piano, the root-position keys B, D#, F#, A show B7 most clearly.
Comparing B7 with its closest relatives helps to fix it in your ear. In short, dominant 7th against major 7th: B7 uses the flattened 7th A, while the major 7th version uses A#. One semitone separates a bluesy pull from a dreamy shimmer. Hearing the comparison matters more than reading it: play B7, then play the chord it is compared with above, and let your ear find the note that changed. On the piano, the root-position keys B, D#, F#, A show B7 most clearly.
How to play B7 on piano
On the piano, B7 is played from the keys B, D#, F#, A. In root position the lowest note is B, the root, with the other notes stacked above it in the order B, D#, F#, A. Play it with the right hand first, then with the left hand an octave lower, so both hands know the shape of B7 before you try it in a progression.
First inversion of B7 puts D# in the bass, with the notes in the order D#, F#, A, B. The chord is still B7 — the notes have not changed, only their order — but the bass note changes how it connects to the chord before and after it. Use this inversion when the bass line wants to step to D# rather than jump to B, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Second inversion of B7 puts F# in the bass, with the notes in the order F#, A, B, D#. The chord is still B7 — the notes have not changed, only their order — but the bass note changes how it connects to the chord before and after it. Use this inversion when the bass line wants to step to F# rather than jump to B, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Third inversion of B7 puts A in the bass, with the notes in the order A, B, D#, F#. The chord is still B7 — the notes have not changed, only their order — but the bass note changes how it connects to the chord before and after it. Use this inversion when the bass line wants to step to A rather than jump to B, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
For fingering, a good starting point for B7 in root position in the right hand is thumb on B, then one finger per note in order, with the little finger on the top note A. For the left hand, mirror it: little finger on the low B and thumb on the top note. When a note is a black key — D#, F# — let your longer fingers take it, since they reach the black keys more easily. Practise B7 in root position and first inversion, hands separately, then together, at a slow tempo, and use the Piano Chord Finder to check the voicing on the keyboard.
Common mistakes
These are the mistakes that most often make B7 sound wrong on the piano, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Resolving it nowhere. B7 wants to move, usually to the tonic a fourth above its root. Practise the V7–I move so the resolution lands cleanly. On the piano, play the keys B, D#, F#, A slowly and listen for each note of B7 in turn.
Muddy low voicings. The flattened 7th low down can sound muddy. Try a higher voicing or drop the 5th, which is the least important note in a dominant 7th chord. On the piano, play the keys B, D#, F#, A slowly and listen for each note of B7 in turn.
Playing every inversion with the same hand shape. Each inversion of B7 needs its own hand shape, because the notes sit under different fingers. If you force the root-position fingering onto an inversion, the hand cramps and notes get missed. Learn the fingering for each inversion of B7 separately, hands apart, before you join them. On the piano, play the keys B, D#, F#, A slowly and listen for each note of B7 in turn.
Playing a major 7th instead. If the 7th comes out as A# rather than A, you have the major 7th chord. Lower that note by one semitone — one fret, or one key down. On the piano, B7 is the keys B, D#, F#, A, and the inversions above move the same notes around.
Where B7 is used
B7 is not a diatonic triad in any major or minor key, because it is an extended or altered chord, but its base triad belongs to the key of E major, the key of F# major, the key of B major. a secondary dominant that can tonicise another chord — V7 of almost anything. As a dominant-type chord it also points toward E major, the key a perfect fourth above B, which is the tonic it most often resolves to. That is where B7 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the piano, B7 is the keys B, D#, F#, A, and the inversions above move the same notes around.
You will meet B7 in progressions such as 12 bar blues progression in E major, 12 bar blues progression in F# major, 12 bar blues progression in B major. Try playing one of those progressions slowly and listening to how B7 behaves in context — whether it sounds like home, like a lift, or like a chord pulling toward the next one. That context is the fastest way to learn what B7 is for, because a chord on its own tells you its notes, but a chord in a progression tells you its job. On the piano, the root-position keys B, D#, F#, A show B7 most clearly.
The same chord on other instruments is covered in B7 on guitar, B7 on ukulele, B7 on bass, and the scales that fit over it are the B major scale and the B minor pentatonic scale. Learning B7 on the piano and then checking it on another instrument is one of the best ways to fix the notes — B, D#, F#, A — in your memory, because the notes stay the same while everything else changes.
Practising B7
A short worked example makes B7 concrete. Play the four-chord progression E – B – C#m – A in E major, the key B7 most often resolves toward: E – B – C#m – A. Play each chord for one bar at a slow tempo, and listen to how B7 sounds in that sequence — whether it feels like home, like a lift, or like a chord on its way somewhere else. Then play the same four chords in a different order, starting on B7 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the piano, the root-position keys B, D#, F#, A show B7 most clearly.
For a second exercise, play B7 and then the chord a fourth above B, back and forth, four times each. That move — a chord and the chord a fourth above it — is the most common resolution in Western music, and it is the move B7 is built for when it acts as a dominant. Finish by playing B7 on its own, slowly, and naming each note out loud as you play it: B, D#, F#, A. Naming the notes while you play them is what turns a shape into knowledge you can use in any key. Test yourself with the Practice Chord Quiz and keep time with the Metronome as the tempo rises. On the piano, play the keys B, D#, F#, A slowly and listen for each note of B7 in turn.
Frequently asked questions
Which chord does B7 resolve to?
Most often it resolves to the tonic a perfect fourth above B — the I chord of the key where B7 is the V7. In the blues it can also stay put for a whole bar, which is part of the style. On the piano, the root-position keys above show where that note sits.
How do you play B7 on the piano?
In root position, play the keys B, D#, F#, A, with B as the lowest note. That is the basic shape of B7 on the piano. The inversions above put a different note in the bass, and the Chord Inverter shows every inversion of B7 on the keyboard.
What is the first inversion of B7?
The first inversion of B7 puts D# in the bass, with the notes in the order D#, F#, A, B. The chord is still B7 — only the bass note has changed — and it is the inversion to use when the bass line steps to D#.
Which fingers do you use for B7 on piano?
In the right hand, start with the thumb on B and one finger per note in order, ending with the little finger on A. In the left hand, mirror it with the little finger on the low B. Longer fingers take the black keys, so check which notes of B7 are black keys before you settle on a fingering.
What is the difference between B7 and Bmaj7?
B7 has the flattened 7th A, while Bmaj7 has the major 7th A#. That one note changes the function completely: B7 is a dominant chord that wants to resolve, Bmaj7 is a settled, jazzy tonic colour. On the piano, the root-position keys above show where that note sits.