Learn › C#7 Chord on Piano (C Sharp Dominant 7th)
New Released in April 2026
C#7 Chord on Piano (C Sharp Dominant 7th)
The C sharp dominant 7th chord (C#7) on the piano has four notes: C#, E#, G#, B. It is a C# triad with a minor seventh, B, on top. Formula 1 3 5 b7. Below: the four positions, fingering, a three-note voicing and where C#7 goes next.
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C#7 fingering, both hands
| Hand | C# | E# | G# | B |
|---|---|---|---|---|
| Right hand | 1 (thumb) | 2 | 3 | 5 (little) |
| Left hand | 5 (little) | 3 | 2 | 1 (thumb) |
Land all four fingers at once. If B is quieter, the little finger is too flat.
A three-note C#7
Drop the fifth and keep C# E# B: root, third and seventh. Pianists use this shell voicing in the left hand, because those three notes already say "C#7".
How to practise C#7
- Play C#, E#, G#, B slowly in root position and say "C#7" each time.
- Walk up through the inversions (E# G# B C#, G# B C# E#, B C# E# G#) without lifting the whole hand.
- Loop G#m7 → C#7 → F#maj7 until the change into and out of C#7 is clean.
- Finally meet it in random order between other chords, with a check on every note.
A few minutes every day on C#7 beat one long session a week.
Four 7th chords on C#
Play the four in a row and listen to each colour.
C#7 inversions on the keyboard
Move C# up an octave for the 1st inversion, then E# for the 2nd, then G# for the 3rd.
Root position: C# E# G# B
1st inversion: E# G# B C#
2nd inversion: G# B C# E#
3rd inversion: B C# E# G#
Where C#7 goes
- C#7 is the V7 chord of F# major and of F# minor: it pulls into F# / F#m.
- In a ii-V-I in F# major it is the middle chord: G#m7 → C#7 → F#maj7.
- Between E# and B there is a tritone, the interval that creates the pull. G7 has the same two notes, so it can replace C#7 (tritone substitution).
Make C#7 automatic
ChordRunner sends C#7 at you between other chords and checks every note you play. MIDI keyboard or microphone, both work.
Play the demoCommon questions
What notes are in the C sharp dominant 7th chord?
C#7 has four notes: C#, E#, G#, B. Root, major third, perfect fifth and minor seventh (formula 1 3 5 b7).
What are the inversions of C#7?
Root position C# E# G# B, 1st inversion E# G# B C#, 2nd inversion G# B C# E# and 3rd inversion B C# E# G#. Every position is still C#7.
Where does C#7 go?
C#7 is the V7 chord of F# major and of F# minor: it pulls into F# / F#m. In a ii-V-I in F# major it is the middle chord: G#m7 → C#7 → F#maj7.
Can I practise C#7 with a MIDI keyboard?
Yes. In ChordRunner a USB MIDI keyboard is detected automatically, and an acoustic piano works through the microphone. C#7 counts in any inversion, as long as C#, E#, G#, B sound together.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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