C# Major 11th

Notes:C# – F – G# – C – D# – F#
Formula:R-M3-P5-M7-M9-P11
Intervals:P1-M3-P5-M7-M9-P11
Scale Degrees:1-3-5-7-9-11

Introduction

The C# Major 11th piano chord (C#maj11) consists of the notes C#, F, G#, C, D#, F#. It is a major 9th chord with an added perfect 11th, giving it a bright, expansive character with a dreamy quality found in jazz and contemporary classical music. Formula: R-M3-P5-M7-M9-P11 | Scale degrees: 1-3-5-7-9-11.

Enharmonic equivalent: C♯ is enharmonically equivalent to D♭. See Db Major 11th.

Notes

Notes:C# – F – G# – C – D# – F#

C# Major 11th Inversions

PositionNotes
Root PositionC#4 – F4 – G#4 – C5 – D#5 – F#5
1st InversionF4 – G#4 – C5 – C#5 – D#5 – F#5
2nd InversionG#4 – C5 – C#5 – D#5 – F5 – F#5

Key Signature

The key of C# Major 11th has 7 sharps: F♯, C♯, G♯, D♯, A♯, E♯, B♯.

F♯C♯G♯D♯A♯E♯B♯

Theory: Intervals

Formula: R-M3-P5-M7-M9-P11
Intervals: P1-M3-P5-M7-M9-P11

The C# Major 11th is built by stacking intervals from the root note. The formula R-M3-P5-M7-M9-P11 describes the scale degrees used. The intervals P1-M3-P5-M7-M9-P11 show the distance between each note in the chord.

C# Major 11th — Frequently Asked Questions

What notes are in the C# Major 11th chord?

C# Major 11th is built from the C# root. Check the interactive keyboard above for exact notes and fingering.

How is the C# Major 11th chord used in music?

C# Major 11th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Major 11th).

What is the fingering for C# Major 11th?

See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.

What are the inversions of C# Major 11th?

Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.

Practice Tips

  • Extended jazz voicing with the 11th.
  • Drop notes for practical voicings.
  • The 11th adds suspension.
  • Compare with the 9th version.
  • Jazz and funk applications.
  • Quartal voicings work well.