The A6 piano chord is a major 6th chord with the notes A, C#, E, F#. On piano it is played from the keys A, C#, E, F#, root position first, then in inversions. Whether you are learning it for the first time or checking a voicing, this page has the notes, the piano fingerings, the inversions and alternatives, and the progressions it appears in.
What notes are in the A6 chord?
The A6 chord is a major 6th chord, and its notes are fixed: A, C#, E, F#. 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 A, so you can see the structure of A6 at a glance. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
| Note | Interval |
|---|---|
| A | Root |
| C# | 3 |
| E | 5 |
| F# | 6 |
The root is A, the note the chord is named after and the note your ear hears as home. Above it, the intervals in A6 are 3, 5, 6. Once you know the intervals, you can build A6 from any root by counting the same semitone steps, which is how the chord works in every key. On the piano, the notes appear in the order the fingering dictates, but the set of notes never changes.
A6 sounds mellow and open, a major chord with an extra note that adds warmth without adding tension. That character comes straight from the intervals above, not from the instrument: the same notes on piano, guitar or ukulele carry the same colour, even though the voicing changes. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
Comparing A6 with its closest relatives helps to fix it in your ear. In short, 6th against major 7th: A6 adds the 6th F#; the major 7th chord adds G# instead. The 6th sounds warmer and more old-fashioned; the 7th sounds dreamier. Play both chords slowly, one after the other, and notice which note moves. Naming that note out loud while you play is the fastest way to learn the difference. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
How to play A6 on piano
On the piano, A6 is played from the keys A, C#, E, F#. In root position the lowest note is A, the root, with the other notes stacked above it in the order A, C#, E, F#. Play it with the right hand first, then with the left hand an octave lower, so both hands know the shape of A6 before you try it in a progression.
First inversion of A6 puts C# in the bass, with the notes in the order C#, E, F#, A. The chord is still A6 — 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 C# rather than jump to A, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Second inversion of A6 puts E in the bass, with the notes in the order E, F#, A, C#. The chord is still A6 — 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 E rather than jump to A, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Third inversion of A6 puts F# in the bass, with the notes in the order F#, A, C#, E. The chord is still A6 — 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 A, 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 A6 in root position in the right hand is thumb on A, then one finger per note in order, with the little finger on the top note F#. For the left hand, mirror it: little finger on the low A and thumb on the top note. When a note is a black key — C#, F# — let your longer fingers take it, since they reach the black keys more easily. Practise A6 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 A6 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.
Voicing it too low. The 6th sits close to the 5th and 7th in low octaves and can sound muddy. Spread the notes out. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
Playing every inversion with the same hand shape. Each inversion of A6 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 A6 separately, hands apart, before you join them. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
Confusing the 6th with the 7th. The added note here is F#, a whole step above the 5th, not the 7th. Play G# and you have a different chord. On the piano, play the keys A, C#, E, F# slowly and listen for each note of A6 in turn.
Burying the 6th. F# is the colour note of this chord. If it is muted or too quiet, the chord is just a major triad and the vintage warmth is gone. On the piano, play the keys A, C#, E, F# slowly and listen for each note of A6 in turn.
Where A6 is used
A6 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 D major, the key of E major, the key of A major. a gentler alternative to the major 7th when you want warmth without the dreamy shimmer. As a dominant-type chord it also points toward D major, the key a perfect fourth above A, which is the tonic it most often resolves to. That is where A6 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the piano, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
Because A6 is an extended or altered chord, it appears in progressions as a colour or a dominant rather than as a diatonic staple. Try it in place of the plain A triad in a progression you already know, and listen to how the extra notes change the feel — that substitution is the usual way extended chords enter real music. The Chord Progression Builder lets you try A6 in a progression in any key and hear how it connects to the chords around it. On the piano, play the keys A, C#, E, F# slowly and listen for each note of A6 in turn.
The same chord on other instruments is covered in A6 on guitar, A6 on ukulele, A6 on bass, and the scales that fit over it are the A major scale and the A minor pentatonic scale. Learning A6 on the piano and then checking it on another instrument is one of the best ways to fix the notes — A, C#, E, F# — in your memory, because the notes stay the same while everything else changes.
Practising A6
A short worked example makes A6 concrete. Play the four-chord progression D – A – Bm – G in D major, the key A6 most often resolves toward: D – A – Bm – G. Play each chord for one bar at a slow tempo, and listen to how A6 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 A6 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the piano, play the keys A, C#, E, F# slowly and listen for each note of A6 in turn.
For a second exercise, play A6 and then the chord a fourth above A, 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 A6 is built for when it acts as a dominant. Finish by playing A6 on its own, slowly, and naming each note out loud as you play it: A, C#, E, F#. 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, A6 is the keys A, C#, E, F#, and the inversions above move the same notes around.
Frequently asked questions
What is the difference between A6 and Amaj7?
A6 adds the 6th F#; Amaj7 adds the major 7th G#. The 6th chord sounds warmer and more old-fashioned, the maj7 sounds dreamier and more modern. On the piano, the root-position keys above show where that note sits.
How do you play A6 on the piano?
In root position, play the keys A, C#, E, F#, with A as the lowest note. That is the basic shape of A6 on the piano. The inversions above put a different note in the bass, and the Chord Inverter shows every inversion of A6 on the keyboard.
What is the first inversion of A6?
The first inversion of A6 puts C# in the bass, with the notes in the order C#, E, F#, A. The chord is still A6 — only the bass note has changed — and it is the inversion to use when the bass line steps to C#.
Which fingers do you use for A6 on piano?
In the right hand, start with the thumb on A and one finger per note in order, ending with the little finger on F#. In the left hand, mirror it with the little finger on the low A. Longer fingers take the black keys, so check which notes of A6 are black keys before you settle on a fingering.
What does the 6 mean in A6?
The 6 means the 6th note of the scale, F#, is added to the major triad. A6 contains A, C#, E, F#: root, major 3rd, perfect 5th and the added 6th. On the piano, the root-position keys above show where that note sits.