The Fsus4 piano chord is built from the notes F, A#, C. On piano it is played from the keys F, A#, C, root position first, then in inversions. It is a suspended 4th 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 Fsus4 chord?
The Fsus4 chord is a suspended 4th chord, and its notes are fixed: F, A#, C. 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 F, so you can see the structure of Fsus4 at a glance. On the piano, the root-position keys F, A#, C show Fsus4 most clearly.
| Note | Interval |
|---|---|
| F | Root |
| A# | 4 |
| C | 5 |
The root is F, the note the chord is named after and the note your ear hears as home. Above it, the intervals in Fsus4 are 4, 5. Learn those intervals rather than memorising the shape alone, because the same interval pattern transposed to another root gives you the same quality of chord anywhere. On the piano, the notes appear in the order the fingering dictates, but the set of notes never changes.
Fsus4 sounds tense and expectant — the 4th ({fourth}) leans hard against the root and begs to resolve to the 3rd. 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 Fsus4 noticeably. On the piano, the root-position keys F, A#, C show Fsus4 most clearly.
Comparing Fsus4 with its closest relatives helps to fix it in your ear. In short, sus4 against sus2: Fsus4 uses the 4th A# where the sus2 uses the 2nd G. The sus4 is tenser and its resolution to the 3rd is more dramatic. 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, Fsus4 is the keys F, A#, C, and the inversions above move the same notes around.
How to play Fsus4 on piano
On the piano, Fsus4 is played from the keys F, A#, C. In root position the lowest note is F, the root, with the other notes stacked above it in the order F, A#, C. Play it with the right hand first, then with the left hand an octave lower, so both hands know the shape of Fsus4 before you try it in a progression.
First inversion of Fsus4 puts A# in the bass, with the notes in the order A#, C, F. The chord is still Fsus4 — 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 F, and practise moving from root position to this inversion without lifting your hand off the keys more than you must.
Second inversion of Fsus4 puts C in the bass, with the notes in the order C, F, A#. The chord is still Fsus4 — 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 F, 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 Fsus4 in root position in the right hand is thumb on F, then one finger per note in order, with the little finger on the top note C. For the left hand, mirror it: little finger on the low F 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 Fsus4 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 Fsus4 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.
Never resolving the 4th. The 4th A# wants to fall to A. If you sit on the sus4 forever the chord sounds stuck. Practise the sus4-to-major move until the resolution feels natural. On the piano, Fsus4 is the keys F, A#, C, and the inversions above move the same notes around.
Resolving to the wrong 3rd. The sus4 resolves to the major 3rd A, not the minor 3rd. Resolve to G# and you have changed key, not resolved. On the piano, play the keys F, A#, C slowly and listen for each note of Fsus4 in turn.
Playing the 3rd as well. If A sounds together with A# the chord clashes badly. The 3rd must be absent while the 4th is present. On the piano, play the keys F, A#, C slowly and listen for each note of Fsus4 in turn.
Hitting it too hard. A sus4 played at full volume can sound harsh. Play it a touch softer than the chord it resolves to. On the piano, Fsus4 is the keys F, A#, C, and the inversions above move the same notes around.
Where Fsus4 is used
Fsus4 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 A# major. a way to delay a chord: play the sus4, hold it, then let it fall to the triad. As a dominant-type chord it also points toward A# major, the key a perfect fourth above F, which is the tonic it most often resolves to. That is where Fsus4 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the piano, play the keys F, A#, C slowly and listen for each note of Fsus4 in turn.
Because Fsus4 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 F 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 Fsus4 in a progression in any key and hear how it connects to the chords around it. On the piano, play the keys F, A#, C slowly and listen for each note of Fsus4 in turn.
The same chord on other instruments is covered in Fsus4 on guitar, Fsus4 on ukulele, Fsus4 on bass, and the scales that fit over it are the F major scale and the F minor pentatonic scale. Learning Fsus4 on the piano and then checking it on another instrument is one of the best ways to fix the notes — F, A#, C — in your memory, because the notes stay the same while everything else changes.
Practising Fsus4
A short worked example makes Fsus4 concrete. Play the four-chord progression A# – F – Gm – D# in A# major, the key Fsus4 most often resolves toward: A# – F – Gm – D#. Play each chord for one bar at a slow tempo, and listen to how Fsus4 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 Fsus4 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the piano, play the keys F, A#, C slowly and listen for each note of Fsus4 in turn.
For a second exercise, play Fsus4 and then the chord a fourth above F, 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 Fsus4 is built for when it acts as a dominant. Finish by playing Fsus4 on its own, slowly, and naming each note out loud as you play it: F, A#, C. 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 F, A#, C slowly and listen for each note of Fsus4 in turn.
Frequently asked questions
What is the first inversion of Fsus4?
The first inversion of Fsus4 puts A# in the bass, with the notes in the order A#, C, F. The chord is still Fsus4 — only the bass note has changed — and it is the inversion to use when the bass line steps to A#.
Which fingers do you use for Fsus4 on piano?
In the right hand, start with the thumb on F and one finger per note in order, ending with the little finger on C. In the left hand, mirror it with the little finger on the low F. Longer fingers take the black keys, so check which notes of Fsus4 are black keys before you settle on a fingering.
What does sus4 mean in Fsus4?
Sus4 means the 3rd of the chord is suspended — replaced by the 4th, A#. Fsus4 contains F, A#, C, and the 4th is the note that makes it sound tense and unresolved. On the piano, check the root-position keys above for that note.
How do you resolve Fsus4?
Let the 4th A# fall by a semitone to the major 3rd A. That one-step move, sus4 to major, is the classic resolution and the sound every listener expects. On the piano, check the root-position keys above for that note.
Is Fsus4 major or minor?
Neither, while it is suspended: it has no 3rd. It usually resolves to the major triad, which is why it is most often heard as a delayed major chord. On the piano, check the root-position keys above for that note.