D Diminished Triad

Chord Tones: D Diminished Triad

Symbol: dim, ° — Formula: 1-♭3-♭5

Chord Notation

Roman numeral (e.g. I, IV, V) and Nashville Number notation are key-dependent. See Keys pages for chord function within specific keys.

Inversions

Harmonic Function

The D diminished chord commonly functions as the supertonic (ii) in C major or dominant (V) in G major. Its harmonic role varies by key — in major keys it provides stable harmonic grounding.

The diminished triad features a flat third and flat fifth, creating a tense, unstable sound. It occurs naturally on the seventh degree of the major scale and resolves strongly to the tonic. The D Diminished Triad specifically contains 3 notes: D, F, G♯ (formula: 1-♭3-♭5). On guitar, D-rooted chords use the open D string as their bass note, and the compact open-D shape is one of the most recognizable chord voicings. Rock anthems and folk songs frequently center on D chords, which provide a bright, cutting tone that projects well in ensemble settings.

Common Progressions

The D Diminished Triad frequently appears in these progression patterns (shown in Roman numeral notation relative to key):

• viidim-I
• iidim-V

Songs Featuring the Diminished Triad

Well-known songs where the D Diminished Triad — or this chord type — plays a prominent role:

• Whole Lotta Love – Led Zeppelin (bridge)
• Killing Me Softly – Roberta Flack
• Black Magic Woman – Santana

Tuning Frequencies Across Temperaments

Frequencies shown at A=440 Hz. View full temperament data for any note.

Scales Containing the D Diminished Triad

These scales include the D Diminished Triad as a diatonic or characteristic chord: