Cm Chord on Ukulele
Cm = C – D# – G (Root, Minor 3rd, Perfect 5th)
C minor asks for a small barre, but not the same one D major uses: here the index finger flattens across the C, E, and A strings at the third fret, while the G string rings open underneath it. That's three strings pinned by one finger and one string left alone — a slightly different coordination puzzle than D's barre, which covers the three lowest strings and leaves the highest one open. The open G string supplies the chord's fifth, and the barre itself supplies both the root (on the A string) and the flatted third (on the C string), plus a doubled fifth on the E string.
Unlike A minor, C minor isn't a diatonic chord inside the key of C major — it belongs to C's parallel minor, a different key entirely with its own key signature (three flats), and its own relative major, Eb. That makes it a chord most players encounter either because a piece is genuinely written in C minor, or because a songwriter borrows it briefly into a C major progression for a moment of shadow before returning to the brighter I chord — a device called modal interchange, or borrowing from the parallel minor. Its sound is heavier and more brooding than Am, since the barre removes any open, ringing top string the way Am's shape keeps three; almost the whole chord is fretted, damped tone. That contained, slightly muted quality is part of why Cm reads as more dramatic than Am even though both are minor triads only a few semitones apart in root.
Fingerings
Open Position
How to Practice It
Lay the index finger flat across the C, E, and A strings with even pressure along its whole length, and listen specifically to the E string in the middle — it's the one most likely to buzz if the finger's pressure tapers off partway across. Keep the open G string clear of the barre finger's edge; a common mistake is letting the side of the index finger brush against it and choke its ring. Because this shape shares its exact fret and barre position with C's dominant seventh relative chords, comparing Cm against a plain C major (which uses no barre at all, just the ring finger on the A string) is a good way to feel how differently the hand has to organize itself for these two close-together chords.
Common Progressions
- i – iv – V (Cm – Fm – G7, in C minor)
- i – VI – III – VII (Cm – Ab – Eb – Bb)
- Borrowed iv-of-the-parallel-minor color chord inside a C major song (C – F – Cm – G)
- i – VII – VI – V (Cm – Bb – Ab – G)
FAQ
- Is C minor part of the key of C major?
- No — it belongs to C's parallel minor key, a separate key signature with three flats, not to C major's diatonic chord set the way Am, Dm, and Em are.
- Why does C minor sound heavier than A minor on ukulele?
- Because its shape is a barre across three strings with no open top string ringing above it, giving the chord a more contained, fretted tone compared to Am's airier open-string voicing.
- How is C minor used inside a C major song?
- As a borrowed chord from the parallel minor key — a brief, purposeful darkening of the harmony before the progression returns to C major, a technique called modal interchange.
- What's the trickiest part of the C minor barre?
- Keeping even pressure across all three barred strings while the open G string beside them stays completely clear — the E string in the middle of the barre is the first to buzz if pressure isn't consistent.
- What's C minor's relative major, and why does that matter?
- Eb major — a key most ukulele players encounter far less often than C or G, which is part of why Cm itself feels like a slightly unfamiliar detour even for players who are otherwise comfortable with basic minor chords like Am or Dm.
- Does Cm ever appear in Hawaiian or hapa haole ukulele repertoire?
- Less often than the diatonic minor chords of C major, but it does surface in more harmonically adventurous arrangements and in mainland pop or jazz standards adapted for ukulele, where a brief parallel-minor detour is a deliberate compositional choice rather than an accident of the key signature.
Cm on other instruments: Cm on Guitar, Cm on Piano. Related: how chords are built, chord finder.