C# · Ukulele

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.

Listen first

What you just heard

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.

Now it's your hands' turn

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 — the position marked with ⭐ is the easiest to play. 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.

Precision Tuner — Before you play these shapes, get in tune — chromatic tuner and reference tones · open in Chord & 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.

Every shape of C# lives in Chord & Fret Pro — 4 instruments, 16 tunings, 41 chord types and 57 scales, in every key. Start free. Unlock everything with Pro. 100% offline. No ads, no trackers.

What is C#?

C#: C# Major. The notes are C#, E#, G# (fixed-do: Do#, Mi#, Sol#) — the degrees 1–3–5.

Where this chord lives

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? Move the whole chart and find the easiest capo · try it in Chord & Fret

Identify Chord — Found a shape on your own fretboard? The app names it back · see it in Chord & Fret

Real songs pass through here: Gospel · ii-V-I estendido

Where it tends to go

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.

When you want to go further

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.

Scale — The whole scale on the neck — in boxes or 3 notes per string; on the major modes, on guitar in standard tuning, with the CAGED forms named · try it in Chord & Fret

Improvising in context

To improvise over C# as home, the C# Ionian scale fits entirely — it contains every note of the chord. And when the dominant (G#) pulls back, the leading tone C is the note that wants to resolve home.

Swaps that work:

• Bbm7 — Relative minor (vi) — same tonic function
• Fm7 — Mediant (iii) — tonic function

Reharmonize — Want richer substitutions? Reharmonize the progression in a tap · use it in Chord & 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.

Updated July 9, 2026