G Suspended 4th Chord

Chord Tones: G Suspended 4th Chord

Symbol: sus4, sus — Formula: 1-4-5

DegreeNoteFrequency (A=440, Equal)
1 G4 391.995 Hz
4 C4 261.626 Hz
5 D4 293.665 Hz

Chord Notation

Notation TypeSymbol / Value
Lead Sheet SymbolGsus4
All Common Symbolssus4, sus
Interval Formula1-4-5
Harmonic Categoryopen

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

InversionNotes (low to high)Bass NoteSlash Notation
Root Position G4 C4 D4 G G Suspended 4th Chord
First Inversion C4 D4 G4 C G Suspended 4th Chord/C
Second Inversion D4 G4 C4 D G Suspended 4th Chord/D

Harmonic Function

The G sus4 chord commonly functions as the dominant (V) in C major — strongest resolution point. Its harmonic role varies by key — in major keys it provides stable harmonic grounding.

The sus4 chord replaces the third with a perfect fourth, creating tension that traditionally resolves down to the major third. It creates anticipation and is common before dominant chords. The G Suspended 4th Chord specifically contains 3 notes: G, C, D (formula: 1-4-5). On guitar, G-rooted chords benefit from the open G, B, and D strings, enabling full-sounding voicings with minimal fretting. Country, bluegrass, and acoustic pop rely heavily on G-rooted chords, which ring with a bright, open quality on steel-string guitars.

Common Progressions

The G Suspended 4th Chord frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

Songs Featuring the Suspended 4th Chord

Well-known songs where the G Suspended 4th Chord — or this chord type — plays a prominent role:

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

NoteEqual Temp.PythagoreanJust Intonation
G4 391.995 Hz 391.111 Hz 392.438 Hz
C4 261.626 Hz 260.740 Hz 261.626 Hz
D4 293.665 Hz 293.332 Hz 294.329 Hz

Scales Containing the G Suspended 4th Chord

These scales include the G Suspended 4th Chord as a diatonic or characteristic chord: