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Chord · Reference entry

C♯ 7♭13

Notes: C♯ – E♯ – G♯ – B – A
Degrees: 1 – 3 – 5 – ♭7 – ♭13

Also written: C♯7♭13

The C♯ 7♭13 chord is a five-note chord made up of C♯, E♯, G♯, B, and A. It is built from a root, major third, perfect fifth, minor seventh, and minor thirteenth.

C#-E#-G#-B-A
Maintained by Justin Evans, a pianist of 25 years
Suggest a correction · Last updated July 2026
D♭ 7♭13
This is the same chord as D♭ 7♭13 — the same keys on the keyboard, spelled with flats.

Construction

C♯ 7♭13 = Root + Major 3rd + Perfect 5th + Minor 7th + Minor 6th = C♯ · E♯ · G♯ · B · A
NoteIntervalDegree
C♯Root1
E♯Major 3rd3
G♯Perfect 5th5
BMinor 7th♭7
AMinor 6th♯5

C♯ 7♭13 — Frequently Asked Questions

What is the C♯ 7♭13 chord on piano?
The C♯ 7♭13 chord contains the notes C♯ – E♯ – G♯ – B – A. On piano, play these notes together to sound the chord.
What notes are in the C# 7♭13 chord?
The C# 7♭13 chord (C#7♭13) contains 5 notes: C#, F, G#, B, A. Formula: R-M3-P5-m7-m13.
How is C#7♭13 used in music?
C#7♭13 is used in jazz, fusion, and contemporary music to add harmonic color. It appears as a dominant or tonic chord depending on context.
What is the scale degree formula for C#7♭13?
C#7♭13 uses scale degrees 1-3-5-b7-b13, giving it its distinctive sound.

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

    Carl E. Gardner(1912)

    Essentials of Music Theory, Elementary volume

    Public domain treatise
  2. 2

    Cooke, James Francis(1913)

    Mastering the Scales and Arpeggios, Lesson IV, "Fingering of the Scales"; scale tables pp. 16-25

    Public domain treatise
  3. 3

    Beethoven, Ludwig van(1802)

    Piano Sonata No. 14 in C♯ minor, Op. 27 No. 2 ("Moonlight"), i

    Public domain score
  4. 4