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C♯ Minor 7♯5

chord·/chords/minor-7th-sharp-5th/c-sharp/

The C♯ Minor 7♯5 chord contains the notes C♯, E, G♯♯, and B.

Notes: C♯, E, G♯♯, B · Piano keys: C♯ E G♯♯ B

Reviewed for accuracy · Last updated July 2026 · Maintained by Justin Evans

D♭ Minor 7♯5
This is the same chord as D♭ Minor 7♯5 — the same keys on the keyboard, spelled with flats.
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C♯
C♯ – E – G♯♯ – B

Practice C♯ Minor 7♯5

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Introduction

The C♯ Minor 7♯5 chord is a four-note chord made up of C♯, E, G♯♯, and B.

Notes

Notes:C♯ – E – G♯♯ – B

Key Signature

A chord has no key signature of its own, but the C♯ Minor 7♯5 is the tonic (i) chord of C# Minor, which shares the signature of its relative major, E Major — 4 sharps (F♯, C♯, G♯, D♯).

F♯C♯G♯D♯

Order of sharps

Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.

F♯C♯G♯D♯A♯E♯B♯

Mnemonic: Father Charles Goes Down And Ends Battle

Chords in the Key of C♯ Minor

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

C1C2C3C4EC5C6C7C8C#G#
i — C♯ Minor (minor)
DegreeNumeralChordQuality
1iC♯ MinorMinor
2ii°D♯ DiminishedDiminished
3IIIE MajorMajor
4ivF♯ MinorMinor
5vG♯ MinorMinor
6VIA MajorMajor
7VIIB MajorMajor

Same Notes, Other Names

The notes C♯ – E – G♯♯ – B aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:

A Add 9→

C♯ Minor 7♯5 — Frequently Asked Questions

What is the C♯ Minor 7♯5 chord on piano?
The C♯ Minor 7♯5 chord contains the notes C♯ – E – 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 reflects piano.org's own interval-derived dataset.

  1. 1

    Jadassohn, Salomon(1883)

    A Manual of Harmony

    Public domain treatise
  2. 2

    Prout, Ebenezer(1889)

    Harmony: Its Theory and Practice

    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

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