Quick Answer & Harmonic Definition

To play the C# Suspended 4th chord on piano, press the keys C#, F#, G# simultaneously. In root position, C# is the lowest note. First inversion places F# in the bass; second inversion uses G# as the lowest note.

Piano Chord

C#sus4 Piano Chord

Replaces the third with a perfect fourth. Classic rock tension before resolution. Learn the C# Suspended 4th chord on piano with interactive keyboard, inversions, and audio playback.

Notes
C# – F# – G#
Intervals
0 – 5 – 7
Type
triad chord
C# F# G#
E
A
D
G
B
e
3
5
7
9
12
3 notes · Standard (E A D G B E)

Playing the C#sus4 Piano Chord

The C#sus4 chord is a suspended 4th chord built on the root C#. It contains 3 notes: C#, F#, G#. On piano, this chord is played by pressing these keys simultaneously or as an arpeggio.

Replaces the third with a perfect fourth. Classic rock tension before resolution. Mastering the C#sus4 chord opens up countless songs and progressions in the key of C#.

Piano Finger Positions for C#sus4

For the C#sus4 triad chord, use these finger positions:

  • Right hand (root position): Thumb (1) on C#, middle finger (3) on F#, pinky (5) on G#.
  • Left hand (root position): Pinky (5) on C#, middle finger (3) on F#, thumb (1) on G#.
  • Arpeggiated: Play the notes sequentially from lowest to highest for a broken triad effect.

C#sus4 Chord Inversions

Inversions change the bass note while keeping the same harmonic quality:

Inversion Bass Note Notes (bottom to top) Sound
Root C# C# – F# – G# Most stable
1st F# F# – G# – C# Lighter, less stable

Interval Structure of C#sus4

Degree Interval Semitones Note in C#
Root Root (R) 0 C#
3rd Perfect 4th 5 F#
5th Perfect 5th 7 G#

Common Progressions with C#sus4 on Piano

  • I–IV–V–I: C#sus4 – F#sus4 – G#sus4 – C#sus4 (classic cadence)
  • I–V–vi–IV: C#sus4 – G# – A#m – F# (pop progression)
  • ii–V–I: D#m – G# – C#sus4 (jazz turnaround)

Other C# Piano Chords

C#
Major
C#m
Minor
C#7
Dominant 7th
C#maj7
Major 7th
C#m7
Minor 7th
C#dim
Diminished

Suspended 4th Chord in All 12 Keys

Csus4 C#sus4 Dsus4 D#sus4 Esus4 Fsus4 F#sus4 Gsus4 G#sus4 Asus4 A#sus4 Bsus4
Virtual Piano
Interactive keyboard
C#sus4 Guitar
Guitar chord shapes
C# Scale
Notes that fit this chord
Songs
Find songs using C#sus4

Knowledge Base & FAQs

C#sus4 Piano Chord — FAQ

Everything you need to know about our browser-based Web Audio engine, instruments, and music theory workspace.

How do I play the C#sus4 chord on piano?

To play the C# Suspended 4th chord on piano, press the keys C#, F#, G# simultaneously.

In root position, C# is the lowest note. First inversion places F# in the bass; second inversion uses G# as the lowest note.

What are the notes in the C#sus4 piano chord?

The C# Suspended 4th piano chord contains 3 notes: C#, F#, G#.

These are derived from the suspended 4th interval formula applied to the root note C#.

What is the best fingering for C#sus4 on piano?

For the C#sus4 triad in root position, use fingers 1 (thumb), 3, and 5 for a triad, or 1, 2, 3, and 5 for a triad chord.

Inversions may use 1, 2, 4 (first inversion) or 1, 3, 5 (second inversion).

What does the C#sus4 chord sound like?

The C#sus4 chord has a replaces the third with a perfect fourth.

classic rock tension before resolution. It provides rich harmonic tension and expressive color within songwriting and jazz arrangements.

What keys does the C#sus4 chord belong to?

C#sus4 appears frequently across modal, jazz, blues, and contemporary progressions as an essential tension or resolution voicing.

What are the inversions of C#sus4 on piano?

C#sus4 has 2 inversions.

Root position: C#–F#–G#. First inversion: F#–G#–C#.

What chords go well with C#sus4 on piano?

In the key of C# major, C#sus4 pairs naturally with F# major (IV chord), G# major (V chord), and A#m (vi chord).

The I–IV–V–I progression is a classic way to practice these.

Is C#sus4 a good chord for beginners on piano?

Yes, C#sus4 is a triad with 3 notes, making it accessible for beginners.

Practice playing all 3 keys simultaneously with proper finger positioning.

How do I use C#sus4 in a chord progression?

C#sus4 functions as the tonic (I) in C# major.

A classic progression is I–IV–V–I: C#sus4–F#–G#–C#sus4. Practice this in both hands separately before combining.

What is the difference between C# major and C# minor on piano?

The C# major chord (C#–F–G#) uses a major third (4 semitones from root) for a bright sound.

The C#m chord uses a minor third (3 semitones) for a darker, more emotional sound.