If you want to play Csus4 on the ukulele, start with its notes: C, F, G. Its first ukulele voicing is the open position: G string open; C string open; E string at fret 1 (index finger); A string at fret 3 (middle finger). This is a suspended 4th chord, and the sections below take you from the notes table to real fingerings, common mistakes and the musical contexts where Csus4 sounds right.
What notes are in the Csus4 chord?
The Csus4 chord is a suspended 4th chord, and its notes are fixed: C, F, G. 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 Csus4 at a glance. On the ukulele, the open position voicing is the place to hear it in Csus4.
| Note | Interval |
|---|---|
| C | Root |
| F | 4 |
| G | 5 |
The root is C, the note the chord is named after and the note your ear hears as home. Above it, the intervals in Csus4 are 4, 5. Once you know the intervals, you can build Csus4 from any root by counting the same semitone steps, which is how the chord works in every key. On the ukulele, the notes appear in the order the fingering dictates, but the set of notes never changes.
Csus4 sounds tense and expectant — the 4th ({fourth}) leans hard against the root and begs to resolve to the 3rd. Listen for that character when you play it — if Csus4 does not sound that way, one of the notes is probably wrong, and the table above is the place to check. On the ukulele, the open position voicing is the place to hear it in Csus4.
Comparing Csus4 with its closest relatives helps to fix it in your ear. In short, sus4 against sus2: Csus4 uses the 4th F where the sus2 uses the 2nd D. The sus4 is tenser and its resolution to the 3rd is more dramatic. Practise the two chords back to back and listen to the one note that changes — that single note is the difference between the two chords. On the ukulele, the open position of Csus4 puts those notes under your fingers in the order the fingering lists them.
How to play Csus4 on ukulele
On the ukulele, Csus4 has 3 voicings in the data below, and each one uses the same notes — C, F, G — in a different place on the neck. The first voicing below is the one to learn first, and the alternatives cover the rest of the neck. Finger numbers below use 1 for the index finger, 2 for the middle finger, 3 for the ring finger and 4 for the little finger, and x means the string is not played.
For the open position, Csus4 sits in open position: G string open; C string open; E string at fret 1 (index finger); A string at fret 3 (middle finger). This voicing is comfortable because the fretted notes sit close together, from fret 1 to fret 3, so your hand stays relaxed and every note can ring. Strum or pluck it slowly first and check that every note in Csus4 — C, F, G — sounds, with no buzz and no accidental open string.
For the barre chord, Csus4 sits in around fret 3: G string at fret 5 (middle finger); C string at fret 5 (middle finger); E string at fret 3 (index finger); A string at fret 3 (index finger). It barres across strings 3 to 4 at fret 3 with the index finger. The barre is the hard part: the index finger must press every string from 3 to 4 evenly at fret 3, so roll it slightly onto its bony side and keep it close to the fret wire. If the barre buzzes, move it a fraction closer to the fret and press from the arm, not the thumb alone. Strum or pluck it slowly first and check that every note in Csus4 — C, F, G — sounds, with no buzz and no accidental open string.
The open position puts Csus4 in open position: G string open; C string open; E string at fret 1 (index finger); A string muted. The challenge here is the muted string: 1 string is marked x, and it needs to stay silent. Let the edge of a fretting finger rest lightly on it — muting by touch, not by pressing. Strum or pluck it slowly first and check that every note in Csus4 — C, F, G — sounds, with no buzz and no accidental open string.
Choosing between the voicings of Csus4 is a musical decision, not a right-or-wrong one. The open or low-position voicing rings the most and suits strumming, while a barre or movable voicing lets you slide Csus4 up the neck to any key without changing the shape. When you change chords, pick the voicing of Csus4 that sits closest to the chord before it — shorter moves between shapes mean faster, cleaner changes. Practise the change into Csus4 from the chord that comes before it in your song, not the chord on its own, because the move is the skill. On the ukulele, the open position voicing is the place to hear it in Csus4.
A short practice routine for Csus4 on the ukulele: play the first voicing four times slowly, checking each note, then change to it from the chord a fourth above C and back, four times, at a slow tempo. Then play the second voicing the same way. If a note buzzes, stop and fix the finger placement rather than playing through the buzz — clean notes at a slow tempo become clean notes at full tempo, while buzzes practised fast become habits. Use the Ukulele Chord Finder to see the diagram for Csus4 while you practise, and the Chord Finder to compare it with the same chord on other instruments.
Common mistakes
These are the mistakes that most often make Csus4 sound wrong on the ukulele, and each one has a concrete fix. Work through them one at a time rather than trying to fix everything at once.
Resolving to the wrong 3rd. The sus4 resolves to the major 3rd E, not the minor 3rd. Resolve to D# and you have changed key, not resolved. On the ukulele, start with the first voicing above and listen for the notes C, F, G in Csus4.
Playing the 3rd as well. If E sounds together with F the chord clashes badly. The 3rd must be absent while the 4th is present. On the ukulele, the open position of Csus4 puts those notes under your fingers in the order the fingering lists them.
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 ukulele, start with the first voicing above and listen for the notes C, F, G in Csus4.
Pressing too hard on the nylon strings. Ukulele strings need far less pressure than guitar strings, and pressing hard on Csus4 pulls the notes sharp and tires the hand. Use the lightest touch that gives a clean note, and keep your fingers close to the frets. On the ukulele, start with the first voicing above and listen for the notes C, F, G in Csus4.
Where Csus4 is used
Csus4 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. the chord before the resolution — sus4 to major is one of the most used moves in all music. 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 Csus4 does its work: not as a home chord, but as a chord that creates movement and then resolves. On the ukulele, the open position voicing is the place to hear it in Csus4.
Because Csus4 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 Csus4 in a progression in any key and hear how it connects to the chords around it. On the ukulele, the open position of Csus4 puts those notes under your fingers in the order the fingering lists them.
The same chord on other instruments is covered in Csus4 on guitar, Csus4 on piano, Csus4 on bass, and the scales that fit over it are the C major scale and the C minor pentatonic scale. Learning Csus4 on the ukulele and then checking it on another instrument is one of the best ways to fix the notes — C, F, G — in your memory, because the notes stay the same while everything else changes.
Practising Csus4
A short worked example makes Csus4 concrete. Play the four-chord progression F – C – Dm – A# in F major, the key Csus4 most often resolves toward: F – C – Dm – A#. Play each chord for one bar at a slow tempo, and listen to how Csus4 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 Csus4 itself, and notice how its character changes when it opens the progression instead of sitting inside it. On the ukulele, the open position voicing is the place to hear it in Csus4.
For a second exercise, play Csus4 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 Csus4 is built for when it acts as a dominant. Finish by playing Csus4 on its own, slowly, and naming each note out loud as you play it: C, F, G. 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 ukulele, the open position voicing is the place to hear it in Csus4.
Frequently asked questions
Is Csus4 hard to play on the ukulele?
It depends on the voicing. The first voicing of Csus4 on the ukulele is the easiest starting point, and the movable voicings further up the neck are harder because they need a barre or a wider stretch. Practise the first voicing cleanly at a slow tempo before you try the others, and the harder shapes will come more easily.
What is the easiest voicing of Csus4 on the ukulele?
The open position is the easiest voicing listed for Csus4 on the ukulele: frets 0–0–1–3, fingers 0–0–1–2. Learn that shape first, get every note ringing cleanly, and only then move on to the alternative voicings further up the neck.
What does sus4 mean in Csus4?
Sus4 means the 3rd of the chord is suspended — replaced by the 4th, F. Csus4 contains C, F, G, and the 4th is the note that makes it sound tense and unresolved. On the ukulele, the first voicing above shows where that note sits.
How do you resolve Csus4?
Let the 4th F fall by a semitone to the major 3rd E. That one-step move, sus4 to major, is the classic resolution and the sound every listener expects. On the ukulele, the first voicing above shows where that note sits.
Is Csus4 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 ukulele, the first voicing above shows where that note sits.