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Chord · Reference entry

C Major 7♯11

Major 7♯11 · C – E – F♯ – G – B

The C Major 7♯11 chord (Cmaj7♯11) contains the notes C, E, F♯, G, and B. Its interval formula is 1 3 5 7 ♯11. A major 7th with a raised 11th — Lydian color, a floating sound used in jazz and film scores.

At the keyboard

C · E · F# · G · B
Maintained by Justin Evans, a pianist of 25 years
Maintained for accuracy · Last updated July 2026 · How we review
Flashcards · Chord
Three questions on C Major 7♯11
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C

The C Major 7♯11 chord is a five-note chord made up of C, E, F♯, G, and B.

Construction

C Major 7♯11 = Root + Major 3rd + Diminished 5th + Perfect 5th + Major 7th = C · E · F♯ · G · B
NoteIntervalDegree
CRoot1
EMajor 3rd3
F♯Diminished 5th♭5
GPerfect 5th5
BMajor 7th7

Key Signature

A chord has no key signature of its own, but the C Major 7♯11 is the tonic (I) chord of C Major, whose key signature has no sharps or flats.

Chords in the Key of C Major

These are the triads built on each degree of the C major scale:

C1C2C3CEGC5C6C7C8
I — C Major (major)
DegreeNumeralChordQuality
1IC MajorMajor
2iiD MinorMinor
3iiiE MinorMinor
4IVF MajorMajor
5VG MajorMajor
6viA MinorMinor
7vii°B DiminishedDiminished

C Major 7♯11 — Frequently Asked Questions

What is the C Major 7♯11 chord on piano?
The C Major 7♯11 chord contains the notes C – E – F♯ – G – B. On piano, play these notes together to sound the chord.

Related Tools

Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.

References & Further Reading

The note names, intervals, fingering, and harmony on this chord page are grounded in the following sources. Public domain treatises and scores are linked to their full text; primary data is piano.org's own interval-derived reference dataset — continuously maintained and human-verified, with no fixed publication date.

  1. 1

    Goetschius, Percy(1889)

    The Material Used in Musical Composition

    Public domain treatise
  2. 2

    Riemann, Hugo(1896)

    Harmony Simplified (English translation)

    Public domain treatise
  3. 3
  4. 4

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Entry reviewed and maintained by Justin Evans. Corrections are read and applied.Report an error

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