Learn › Csus4 Chord on Piano (C Suspended 4th)
New Released in April 2026
Csus4 Chord on Piano (C Suspended 4th)
The C suspended 4th chord (Csus4) uses the piano keys C, F and G: the major triad C with its third E lifted to the 4th, F. In one phrase: tense and waiting, the 4th wants to fall to the third.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
How Csus4 is built
Every chord is a recipe of scale steps. For Csus4 the recipe is 1 4 5, counted from C.
Start chord: C
| Note | Step | Interval | Keys from C |
|---|---|---|---|
| C | 1 | root | 0 |
| F | 4 | perfect 4th | 5 |
| G | 5 | perfect 5th | 7 |
Where your hand goes for Csus4
Same notes, different order. Pick the position closest to the chord you just played.
Root position: C F G
1st inversion: F G C
2nd inversion: G C F
Hands and fingers
| Right hand | C F G | 1 4 5 |
|---|---|---|
| Left hand | C F G | 5 2 1 |
A second name for the same keys
The notes of Csus4 also spell Fsus2: start from F and you get root, 2nd and 5th of F. Same keys, two names, and the lowest note picks the one you hear.
Keys and moves for Csus4
- The classic move is Csus4 → C: the 4th F falls one step to the third E and the tension melts.
- You can use it in C major, G major and F major, wherever C itself fits.
A short Csus4 routine
- Find C, then add the other notes one at a time: C, F and G.
- Switch between C and Csus4 ten times without looking at your hand.
- Try Csus4 in 1st inversion, the position that sits closest to your last chord.
- Last, meet Csus4 mixed with chords you already know, in an order you did not plan.
Come back to Csus4 tomorrow: short daily sessions beat one long one.
Play Csus4 in a game
ChordRunner shows a chord symbol and you play it on a MIDI keyboard, a real piano through the microphone or the on-screen keys. Suspended chords have their own level, "Suspended (sus2/sus4)".
Play the demoCommon questions
What is Csus4 on the piano?
Csus4 is the C suspended 4th chord: C, F and G, the major triad C with its third E lifted to the 4th, F.
Is Csus4 the same as Fsus2?
Same keys, yes: Csus4 and Fsus2 contain C, F and G. The name follows the bass note, C for Csus4 and F for Fsus2.
Where is Csus4 used?
The classic move is Csus4 → C: the 4th F falls one step to the third E and the tension melts. You can use it in C major, G major and F major, wherever C itself fits.
Can I practise Csus4 with a MIDI keyboard or a real piano?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic or digital piano works through the microphone. The game checks that C, F and G sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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