C# ukulele chord
C# (C sharp major) is built from C#, E# and G#, the degrees 1–3–5. On ukulele, the main shape is 1 1 1 4, the first diagram, marked with the star.
Think of the sound of getting home and closing the door behind you. That's C# major, in three notes. Hit play below and see if your body doesn't agree.
Hear C# before you play
Why C# sounds this way
Go back to the audio and catch the arpeggio note by note. There are only three: C#, F and G#. The middle one is the one that matters. That's the major third, and it's what gives this chord its wide-open-day face — file that name away, because in a minute we'll move exactly that note and you'll hear the weather change.
How to play C# on ukulele
On the ukulele, the high reentrant G makes every shape light — and with four strings, every note is exposed. So start with the first position below — it's the main shape — that's why it carries the ⭐. One tip from someone who's watched a lot of people get stuck: play the notes one by one before strumming. If one sounds muffled, a finger is touching the next string. Adjust, try again. It's annoying for two days and then never again.
In the app: 7 C# shapes on ukulele
With the fingering and audio of each one, free. In the app, the arpeggio and the campanella of each shape are part of Pro.
Precision Tuner: Get in tune before you play: chromatic tuner and reference tones, free in standard tuning · open in Chord and Fret
The other positions are the same chord living on different floors of the neck. You don't need them today. But when a song asks for it higher and tighter, you'll know where it lives.
Left-handed? Mirror's right here
C# notes and degrees
C# stacks the root C#, the major third E# and the perfect fifth G#.
Where C# shows up
So where does this chord show up in real life? Almost always as VII in D# minor, III in A# minor, I in C# major. Don't memorize that — just notice that the same shape plays different roles in different songs, the way a word changes meaning with the sentence.
Transpose & Capo: Need it in another key? Transpose the progression for free; finding the best capo is part of Pro · try it in Chord and Fret
Identify Chord: Found a shape on your fretboard? Mark it on the screen and the app names the chord, 5 times a day for free · see it in Chord and Fret
Real songs pass through here: Gospel · extended ii-V-I
Where C# usually goes
Treating C# as the home chord (I) of its key, it tends to go toward the pre-dominant (D#m / F#) or the dominant (G# / B#°), and the dominant pulls back home. It's a tendency, not a law.
Going beyond C#
When it's time to improvise over it, C# Ionian (C# D# E# F# G# A# B# · 1 2 3 4 5 6 7: the plain major scale, where everything starts); C# Lydian (C# D# E# F## G# A# B# · 1 2 3 #4 5 6 7: the major scale with a raised fourth — one extra step of daydream) fit entirely. The swaps below are for when your ear gets bored of the obvious.
C# Ionian
In the app: the 7 positions of C# Ionian on ukulele
With degree, note and finger labels on each one, free. Playing the whole scale is part of Pro.
The same C# Ionian in its main shapes along the neck — pick whichever position sits under your hand. The rings mark the guide notes (the 3rd and 7th) that carry this chord's color.
Scale: The scale's positions across the neck, with degree, note and finger labels, free; playing the scale and the tempo-ramp exercise are part of Pro · try it in Chord and Fret
Scales to improvise over C#
To improvise over C# as home, the C# Ionian scale fits entirely: it contains every note of the chord. The best fit depends on the key, the surrounding chords and the tensions you want. And when the dominant (G#) pulls back, the leading tone C is the note that wants to resolve home.
Swaps that work:
- A#m7A#m7A#m7A#m7 — Relative minor (vi) — same tonic function
- Fm7Fm7Fm7Fm7 — Mediant (iii) — tonic function
Reharmonize: Want richer substitutions? Reharmonize's Subtle and Medium levels are free; Bold and Jazz are part of Pro · use it in Chord and Fret
C# is home. And home makes more sense once you step outside for a minute: C#7 is the door — go see what's out there.
C# chord questions
What notes are in the C# chord?
The C# chord is made of the notes C#, E# and G#.
How do you play C# on ukulele?
Form the shape from string 4 to string 1: 1 1 1 4.
What chord comes after C#?
Treating C# as the home chord (I) of its key, it tends to go toward the pre-dominant (D#m / F#) or the dominant (G# / B#°), and the dominant pulls back home. It's a tendency, not a law.
What scale works over C#?
To improvise over C# as home, the C# Ionian scale fits entirely: it contains every note of the chord. The best fit depends on the key, the surrounding chords and the tensions you want.