C dominant seventh (C7) chord on ukulele

Looking for the C7 chord on ukulele? It is a dominant seventh chord (a major triad plus a minor seventh), made of four notes: C – E – G – B♭.

Dots show:

Basic shapeeasy

Open positioneasy

Position 5medium

Position 8medium

Tap a string on a diagram to hear just that string. The sound is generated in your browser with a physical string model.

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What the C7 chord sounds like

The dominant seventh sounds tense and wants to move on: the third and the minor seventh form a tritone that pulls towards the tonic. It is also the basic chord of the blues and early rock'n'roll.

Notes of the C7 chord

Degree	Note	Interval from the root
1	C	root
3	E	major third (4 semitones)
5	G	perfect fifth (7 semitones) – often omitted on fretted instruments
7	B♭	minor seventh (10 semitones)

How to play it – with fingering

Basic shape

String 1 (A): fret 1, index finger (B♭4)
String 2 (E): open (E4)
String 3 (C): open (C4)
String 4 (G): open (G4)

Open position

String 1 (A): fret 3, middle finger (C5)
String 2 (E): open (E4)
String 3 (C): open (C4)
String 4 (G): fret 3, index finger (B♭4)

Position 5

String 1 (A): fret 7, little finger (E5)
String 2 (E): fret 6, middle finger (B♭4)
String 3 (C): fret 7, ring finger (G4)
String 4 (G): fret 5, index finger (C5)

Tuning: G C E A (the G string is higher than the C – standard re-entrant ukulele tuning). In the diagram, × means the string is not played, and a circle means an open string.

Which keys is it in?

The C7 chord is built from the notes of these keys (for minor keys, both the natural and the harmonic minor are considered):

F major: V7 (dominant)
F minor: V7 (dominant)
D minor: VII7

Similar chords and substitutes

If C7 is too hard, or you want a different colour in the same spot, these chords are worth a try.

Substitutes (by function)

F♯7 – tritone substitute: the same third and seventh, swapped – a jazz favourite
Edim7 – diminished seventh on the third: a common stand-in for the dominant
C9 – a fuller dominant (with the ninth)
C7sus4 – suspended dominant, less tense
F – where it resolves (V → I)

Simpler versions

C – all 3 of its notes are in this chord

Richer versions

C9 – the same chord plus 1 colour note
C11 – the same chord plus 2 colour notes
C13 – the same chord plus 2 colour notes

Frequently asked questions

What notes are in the C7 chord?

C, E, G, B♭. The root is C; the intervals of the other notes from the root: major third, perfect fifth, minor seventh.

What is the easiest way to play C7 on ukulele?

The easiest shape above is “Basic shape”, rated easy. We show 4 shapes, from open and easy versions to movable barre shapes higher up the neck.

How do I read the chord diagram?

Strings run from the lowest (left) to the highest (right) – tick “Left-handed” to mirror it. Rows are frets; a number at the side shows the starting fret. Dots are fingers (1 index, 2 middle, 3 ring, 4 little), a long bar is a barre, × means don't play that string and ○ means play it open.

Why is a note missing from some C7 shapes?

On a fretted instrument you can't always play every note of a 4-note chord. The fifth (G) may be dropped – the chord keeps its character without it.

How is the C7 chord written?

The chord symbol is C7, and its full name is C dominant seventh.