C♯dim7 chord on ukulele

C♯dim7 is C♯, E, G and B♭. The easiest shape is 0-1-0-1. Play it once at full speed, then at a quarter to hear every note.

0-1-0-1 · open · easy

Notes: C♯ · E · G · B♭
Formula: 1 · ♭3 · ♭5 · ♭♭7
First shape: 0-1-0-1

How to play C♯dim7 on ukulele

Shape 1, 0-1-0-1, reading from the G string on the left:

C♯: index finger, 1st fret of the C string.
B♭: middle finger, 1st fret of the A string.
Leave the G and E strings open: G and E.

If an open string sounds dead, a fingertip is leaning on it. Come down more on the tips, with your knuckles bent.
Strum with the pad of your index finger or thumb, all four strings, across the spot where the neck meets the body.

Other ways to play C♯dim7

6-7-6-7: movable shape at the 6th fret, medium. Use it when the next chord sits nearby on the neck.
9-10-9-10: movable shape at the 9th fret, medium. A high voicing for when the low version is taken by another instrument.

Moving between C♯dim7 and its neighbours

These are the changes you'll meet most often with C♯dim7, using the first shape of each chord.

D (leads up a half step): C♯dim7 (0-1-0-1) to D (2-2-2-0): the index finger goes to the G string, 2nd fret, your middle finger lands on the C string, 2nd fret, the ring finger comes down on the E string, 2nd fret. No finger can stay, so practice lifting all of them together and landing the new shape as a unit. D on ukulele
Dm (leads up a half step): C♯dim7 (0-1-0-1) to Dm (2-2-1-0): the index finger slides across to the E string at the same fret, your middle finger lands on the G string, 2nd fret, the ring finger comes down on the C string, 2nd fret. No finger can stay, so practice lifting all of them together and landing the new shape as a unit. Dm on ukulele
F♯ (a fifth down): C♯dim7 (0-1-0-1) to F♯ (3-1-2-1): your index and middle fingers stay put, the ring finger comes down on the E string, 2nd fret, the pinky finger comes down on the G string, 3rd fret. The two chords share C♯ and B♭, which is why the change sounds smooth. F♯ on ukulele

C♯dim7 is a diminished seventh: three minor thirds stacked, so the chord divides the octave into four equal parts. All 4 notes of C♯dim7 fit on the ukulele's four strings. Play it once strummed and once picked to hear the difference.

Getting C♯dim7 under your fingers

Arpeggiate 0-1-0-1 from the lowest string: G, C♯, E, B♭. Then strum it and listen for the same 4 notes together. Next, alternate 0-1-0-1 and 6-7-6-7, slowly, until the change takes less than a beat.

D♭dim7 is another spelling of C♯dim7. Same shape, same sound.

Where C♯dim7 shows up

C♯dim7 on guitar and piano

C♯dim7 on guitar and piano uses the same 4 notes in a different layout. See all three together.

Next to try on ukulele

Other diminished seventh chords

C♯dim7 on ukulele: questions

What notes are in C♯dim7 on ukulele?

C♯, E, G and B♭. In the 0-1-0-1 shape the strings play G (G string, open), C♯ (C string), E (E string, open) and B♭ (A string).

What's the easiest way to play C♯dim7 on ukulele?

0-1-0-1, the shape at the top of this page. No barre: some strings ring open.

Is C♯dim7 a barre chord on ukulele?

Not in its common form: 0-1-0-1 needs no barre.

Which string does C♯dim7 start on?

In the 0-1-0-1 shape the lowest string you play is the G string, open, which is G, the diminished fifth.

Shapes and sound are generated from the notes C♯, E, G and B♭ and tested automatically. Updated September 2026.