The C11 piano chord is built from the notes C, E, G, A#, D, F. On piano it is played from the keys C, E, G, A#, D, F, root position first, then in inversions. It is a dominant 11th chord, and this page gives you its exact notes, the fingerings that work on the piano, the mistakes to avoid and the progressions it appears in.
What notes are in the C11 chord?
The C11 chord is a dominant 11th chord, and its notes are fixed: C, E, G, A#, D, 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 C, so you can see the structure of C11 at a glance. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
| Note | Interval |
|---|---|
| C | Root |
| E | 3 |
| G | 5 |
| A# | b7 |
| D | 9 |
| F | 11 |
The root is C, the note the chord is named after and the note your ear hears as home. Above it, the intervals in C11 are 3, 5, b7, 9, 11. Those intervals are the fingerprint of the dominant 11th 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.
C11 sounds open and modern, the sound of jazz and fusion dominants. 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 C11 noticeably. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
Comparing C11 with its closest relatives helps to fix it in your ear. In short, 11th against 9th: C11 adds the 11th F on top of the 9th D. In practice the 3rd is often left out of the voicing, because the 11th clashes with it. Hearing the comparison matters more than reading it: play C11, then play the chord it is compared with above, and let your ear find the note that changed. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
How to play C11 on piano
On the piano, C11 is played from the keys C, E, G, A#, D, F. In root position the lowest note is C, the root, with the other notes stacked above it in the order C, E, G, A#, D, F. Play it with the right hand first, then with the left hand an octave lower, so both hands know the shape of C11 before you try it in a progression.
First inversion of C11 puts E in the bass, with the notes in the order E, G, A#, D, F, C. The chord is still C11 — 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 C, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Second inversion of C11 puts G in the bass, with the notes in the order G, A#, D, F, C, E. The chord is still C11 — 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 G rather than jump to C, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Third inversion of C11 puts A# in the bass, with the notes in the order A#, D, F, C, E, G. The chord is still C11 — 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 C, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Because C11 has 6 notes, it has further inversions beyond the third, each one putting a different chord tone in the bass. The principle stays the same: the notes are always C, E, G, A#, D, F, and the inversion you choose is the one whose bass note makes the smoothest line through the progression. Try the Chord Inverter to see every inversion of C11 on the keyboard.
For fingering, a good starting point for C11 in root position in the right hand is thumb on C, 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 C and thumb on the top note. When a note is a black key — A# — let your longer fingers take it, since they reach the black keys more easily. Practise C11 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 C11 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.
Playing every inversion with the same hand shape. Each inversion of C11 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 C11 separately, hands apart, before you join them. On the piano, C11 is the keys C, E, G, A#, D, F, and the inversions above move the same notes around.
Playing the 3rd and 11th together. E and F clash badly in the same octave. In an 11th chord the 3rd is usually omitted or placed far from the 11th. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
Crowding six notes. Six notes are too many for most voicings. Drop the 5th and often the 3rd too, keeping root, 7th, 9th and 11th. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
Playing the 11th too low. F low down sounds muddy against the root. Keep it high in the voicing. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
Where C11 is used
C11 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 C major, the key of F major, the key of G major. a dominant colour in jazz, where the 11th replaces the 3rd in the voicing to avoid a clash. As a dominant-type chord it also points toward F major, the key a perfect fourth above C, which is the tonic it most often resolves to. That is where C11 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the piano, the root-position keys C, E, G, A#, D, F show C11 most clearly.
Because C11 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 C 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 C11 in a progression in any key and hear how it connects to the chords around it. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
The same chord on other instruments is covered in C11 on guitar, C11 on ukulele, C11 on bass, and the scales that fit over it are the C major scale and the C minor pentatonic scale. Learning C11 on the piano and then checking it on another instrument is one of the best ways to fix the notes — C, E, G, A#, D, F — in your memory, because the notes stay the same while everything else changes.
Practising C11
A short worked example makes C11 concrete. Play the four-chord progression F – C – Dm – A# in F major, the key C11 most often resolves toward: F – C – Dm – A#. Play each chord for one bar at a slow tempo, and listen to how C11 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 C11 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the piano, play the keys C, E, G, A#, D, F slowly and listen for each note of C11 in turn.
For a second exercise, play C11 and then the chord a fourth above C, 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 C11 is built for when it acts as a dominant. Finish by playing C11 on its own, slowly, and naming each note out loud as you play it: C, E, G, A#, D, 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, the root-position keys C, E, G, A#, D, F show C11 most clearly.
Frequently asked questions
Where is C11 used?
C11 is a dominant colour in jazz and fusion, used as a V11 that resolves to the tonic. It suits slow tempos and open voicings where its width can be heard. On the piano, the root-position keys above show where that note sits.
How do you play C11 on the piano?
In root position, play the keys C, E, G, A#, D, F, with C as the lowest note. That is the basic shape of C11 on the piano. The inversions above put a different note in the bass, and the Chord Inverter shows every inversion of C11 on the keyboard.
What is the first inversion of C11?
The first inversion of C11 puts E in the bass, with the notes in the order E, G, A#, D, F, C. The chord is still C11 — only the bass note has changed — and it is the inversion to use when the bass line steps to E.
Which fingers do you use for C11 on piano?
In the right hand, start with the thumb on C 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 C. Longer fingers take the black keys, so check which notes of C11 are black keys before you settle on a fingering.
What notes are in C11?
C11 contains C, E, G, A#, D, F: root, major 3rd, perfect 5th, flattened 7th, 9th and 11th. In practice the 3rd is often omitted from the voicing, because it clashes with the 11th. On the piano, the root-position keys above show where that note sits.