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C7♯5 Chord on Guitar

C7♯5 is the C augmented 7th chord — 4 notes (C, E, G♯, B♭) built from the formula 1 3 ♯5 ♭7. Below are playable shapes across the fretboard, the keys it belongs to and the scales to use when soloing over it.

Notes: C · E · G♯ · B♭Formula: 1 · 3 · ♯5 · ♭7Hear it and see it on the fretboard ▸

C7♯5: Chord shapes (open & barre)

  • C7♯5 – fret 33×R♯5♭73♯5fret 3
  • C7♯5 – fret 88R♯5♭73♯5Rfret 8
  • C7♯5 – fret 1010××R♯5♭73fret 10

C7♯5: Drop 2 voicings

  • C7♯5 – bass: ♯5♯5R3♭7××bass: ♯5
  • C7♯5 – bass: ♯59×♯5R3♭7×bass: ♯5
  • C7♯5 – bass: ♯55××♯5R3♭7bass: ♯5
  • C7♯5 – bass: ♭75♭73♯5R××bass: ♭7
  • C7♯5 – bass: ♭7×♭73♯5R×bass: ♭7
  • C7♯5 – bass: ♭78××♭73♯5Rbass: ♭7
  • C7♯5 – bass: R8R♯5♭73××bass: R
  • C7♯5 – bass: R3×R♯5♭73×bass: R
  • C7♯5 – bass: R10××R♯5♭73bass: R
  • C7♯5 – bass: 3103♭7R♯5××bass: 3
  • C7♯5 – bass: 35×3♭7R♯5×bass: 3
  • C7♯5 – bass: 3××3♭7R♯5bass: 3

C7♯5: Drop 3 voicings

  • C7♯5 – bass: 3103×R♯5♭7×bass: 3
  • C7♯5 – bass: 35×3×R♯5♭7bass: 3
  • C7♯5 – bass: ♯5♯5×3♭7R×bass: ♯5
  • C7♯5 – bass: ♯58×♯5×3♭7Rbass: ♯5
  • C7♯5 – bass: ♭75♭7×♯5R3×bass: ♭7
  • C7♯5 – bass: ♭712×♭7×♯5R3bass: ♭7
  • C7♯5 – bass: R8R×♭73♯5×bass: R
  • C7♯5 – bass: R×R×♭73♯5bass: R

C7♯5: Shell voicings (jazz)

  • C7♯5 – R-3-77R3♭7×××R-3-7
  • C7♯5 – R-3-7×R3♭7××R-3-7
  • C7♯5 – R-7-38R×♭73××R-7-3
  • C7♯5 – R-7-3×R×♭73×R-7-3

Scales to play over C7♯5

Ordered from the most common choice. All of them contain C, E, G♯, B♭.

Other C chords

Triads

Sevenths

Sixths

Added

Extended

Augmented 7th chords in other keys

FAQ

What notes are in the C7♯5 chord?
C7♯5 (C augmented 7th) contains C, E, G♯, B♭ — formula 1 3 ♯5 ♭7.
How do you play C7♯5 on guitar?
A common shape is x36354 (low E to high E, x = muted string, around fret 3). This page shows more shapes, drop 2, drop 3 and shell voicings in the interactive library.
What scale goes with C7♯5?
Good choices to solo over C7♯5: C Whole tone, C Altered (Superlocrian), C Phrygian dominant.