What is the interval between the notes in a diminished chord?

A diminished chord consists of a root note, a minor third, and a diminished fifth. In terms of intervals, the distance between the root note and the third is a minor third, which is a key characteristic of diminished chords. Following this, from the third to the fifth, the interval is another minor third.

This structure is essential in understanding diminished chords, as they create a tense and unstable sound that requires resolution. Each of these minor thirds contributes to the chord’s unique quality, distinct from major or augmented chords, which utilize major third intervals. The prevalence of two minor thirds in a diminished chord is what defines its sonic identity and harmonic function in music.