The C diminished chord (Cdim) is a tense and dissonant chord that consists of the notes C, E♭, and G♭, forming a diminished triad. Its structure, built from a minor third (C to E♭) and a diminished fifth (C to G♭), produces a haunting and unstable sound that naturally seeks resolution. The C diminished chord is frequently used in classical, jazz, and contemporary music to create suspense, tension, or dramatic transitions within progressions. Its unique tonal quality makes it an effective tool for adding complexity and emotional depth to harmonic sequences, often functioning as a passing chord or a pivot to modulate between keys.
Name: C diminished chord
Symnonyms:: C diminished triad
Notes: C, E♭, G♭
Intervals: 1, ♭3, ♭5
Chord symbol: Co
Alternative symbols: Cdim, Cm(♭5), Cm♭5
Type: Triad (three-note chord)
C diminished chord on the Staff
C diminished chord on Piano
C diminished chord on Guitar
C diminished chord on Ukulele
Rowan Ellis is a musician and educator with a passion for exploring the language of harmony and melody. With years of experience across classical, jazz, and contemporary styles, Rowan breaks down music theory into clear, practical insights. His goal is to make chords and scales less intimidating and more inspiring for every musician.