What notes make up F#sus4 on piano?

F#sus4 breaks down to F#, B, C#: start on F#, then stack the rest of the suspended 4th intervals above it. That's the root-position spelling; every inversion keeps the same notes, just reordered bottom to top.

Is F#sus4 an easy chord to play on piano?

Yes — three-note triads are about as approachable as piano chords get, sitting easily under fingers 1, 3, and 5. The only wrinkle with F# is that the root is a black key, which nudges the hand slightly forward.

What's the usual context you'd find F#sus4 written into?

You'll most often find it functioning as a suspension of the I or V chord in F# major, built to resolve down a step into the plain triad. The 4th wants to fall a half or whole step to the 3rd — that resolution is the entire point of the chord.

What's the closest related chord to F#sus4?

Drop the 4th down a half or whole step and F#sus4 resolves into the major or minor triad on the same root — that fall is the entire musical point of a sus4.

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F#sus4 Chord on Piano

F#sus4 = F# – B – C# (Root, Perfect 4th, Perfect 5th)

Stack the suspended 4th formula on F# and you land on F#-B-C#, a chord that sounds unresolved in an obvious, audible way. F# itself is the first black key of the three-black-key group on the keyboard. Struck together in root position, F#sus4 comes out to spanning a perfect fifth or less in root position, well inside a one-hand span for most adult hands. Functionally this is a suspension of the I or V chord in F# major, built to resolve down a step into the plain triad, and the 4th wants to fall a half or whole step to the 3rd — that resolution is the entire point of the chord. The root makes 3 notes in all, which is handy to know before assuming a printed voicing has left something out.

Think of F#sus4 primarily as a suspension of the I or V chord in F# major, built to resolve down a step into the plain triad — that's the job it does most often, on paper and by ear alike. Move F# up an octave and B becomes the bass note — that's first inversion; push again and C# lands on the bottom for second inversion. Neither is optional to know if you want to read a lead sheet fluently. A comfortable one-hand span like this is exactly the kind of shape worth over-practicing hands-separately, since there's no excuse of a difficult reach slowing that process down. It shows up regularly in classical suspensions written out beat by beat, and again in ballad codas that delay the final major chord. The 4th wants to fall a half or whole step to the 3rd — that resolution is the entire point of the chord. Since first black key of the three-black-key group, a black-key root asks the hand to angle slightly forward, a small adjustment that stops feeling foreign after enough repetition. In a group setting the left hand's job often shrinks to the root (or root and fifth) down low, freeing the right hand to keep the full triad intact. Take the identical shape and move it: around middle C it's a standard comping voicing, down low it's practically a bass hit, and up high it turns sparkly and light. Given enough repetition, the unresolved in an obvious, audible way quality alone is enough to identify F#sus4 by ear, long before consciously counting out the intervals that make it up.

Voicings

Root Position

First Inversion

How to Practice It

Start with F#sus4 in root position, right hand only, using fingers 1-3-5. Play it slowly enough to check that every key is actually depressed together — black-key chords are easy to half-press if the hand angle is off. Once the root-position shape is solid, work the inversion(s) the same way, then bring the left hand in on just the root, or root and fifth, an octave down. A metronome at a slow tempo will expose any notes that land a fraction of a second apart before you speed up. Finally, practice moving into and out of F#sus4 from a neighboring chord in the same key so the hand-shape change becomes automatic rather than something you have to think through each time. The 4th needs to actually resolve for the suspension to make musical sense — holding it indefinitely without ever moving to the 3rd defeats the point of using a sus chord at all.

Common Progressions

F#sus4 resolving into F# major (the classic sus-to-triad move)
F#sus4 – IV – V in F# major, using the suspension as a color intro
F#sus4 as a held pickup chord before landing on the I chord

FAQ

What notes make up F#sus4 on piano?: F#sus4 breaks down to F#, B, C#: start on F#, then stack the rest of the suspended 4th intervals above it. That's the root-position spelling; every inversion keeps the same notes, just reordered bottom to top.
Is F#sus4 an easy chord to play on piano?: Yes — three-note triads are about as approachable as piano chords get, sitting easily under fingers 1, 3, and 5. The only wrinkle with F# is that the root is a black key, which nudges the hand slightly forward.
What's the usual context you'd find F#sus4 written into?: You'll most often find it functioning as a suspension of the I or V chord in F# major, built to resolve down a step into the plain triad. The 4th wants to fall a half or whole step to the 3rd — that resolution is the entire point of the chord.
What's the closest related chord to F#sus4?: Drop the 4th down a half or whole step and F#sus4 resolves into the major or minor triad on the same root — that fall is the entire musical point of a sus4.

F#sus4 on other instruments: F#sus4 on Guitar, F#sus4 on Ukulele. Related: how chords are built, chord finder.