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D#dim(Diminished Chord)

Built from two stacked minor thirds. Creates maximum tension and instability.

Notes
D# – F# – A
Intervals (semitones)
0 – 3 – 6
Type
Triad

🎹 D#dim on Piano

Press highlighted keys simultaneously to play the D#dim chord.

R
D#(Root (R))
2
F#(Minor 3rd (♭3))
3
A(Tritone (♭5))

🎸 D#dim on Guitar

The D#dim chord uses notes D#, F#, A. Build a voicing by finding these notes on any strings — root on the 6th string is a common starting point for barre chord shapes.

Interval Analysis

DegreeInterval NameSemitonesNote in D#
RootRoot (R)0D#
3rdMinor 3rd (♭3)3F#
5thTritone (♭5)6A

About the D# Diminished Chord

The D#dim chord (D# Diminished) consists of 3 notes: D#, F#, A. Built from two stacked minor thirds. Creates maximum tension and instability.

To build any diminished chord, apply intervals of 0, 3, 6 semitones above the root. Starting from D#: the notes land on D#, F#, A.

Playing D#dim on Piano

Press D#, F#, A simultaneously. In root position, D# is lowest. First inversion places F# in the bass for a lighter sound; second inversion uses A as the bass note.

Common Chord Progressions Using D#dim

  • I–IV–V: D#dim – G#dim – A#dim (blues and rock)
  • I–V–vi–IV: D#dim – A# – Cm – G# (pop staple)
  • I–vi–IV–V: D#dim – Cm – G# – A# (50s progression)

The D#dim Chord in Context

As a diminished chord, D#dim is the tonic (I) in the key of D# major. It also appears as the IV chord in A# major, and as the V chord in G# major — making it one of the most important chords across all of Western music.

Other D# Chords

D#
Major
D#m
Minor
D#7
Dominant 7th
D#maj7
Major 7th
D#m7
Minor 7th
D#aug
Augmented

Diminished Chord in All 12 Keys

CdimC#dimDdimD#dimEdimFdimF#dimGdimG#dimAdimA#dimBdim
🎹 Virtual Piano
Play D#dim on piano
🎸 Virtual Guitar
See on the fretboard
🎵 D# Scale
Notes that fit D#dim
🎶 Songs
Find songs using D#dim

FAQ

D#dim Chord — Frequently Asked Questions

What notes are in the D#dim chord?
The D# Diminished chord contains: D#, F#, A. These notes are derived by applying the diminished interval formula (0–3–6 semitones) to the root note D#.
What is the D#dim chord used for?
Built from two stacked minor thirds. Creates maximum tension and instability. The D#dim chord is used across pop, rock, jazz, and classical music. As the I chord in the key of D# major, it functions as the most stable resting point in progressions.
How do you play D#dim on piano?
On piano, play D#, F#, A simultaneously. In root position, D# is the lowest note. Inversions move the bass note up — first inversion has F# lowest, second inversion has A lowest.
How many notes are in a diminished chord?
A diminished chord has 3 notes: D#, F#, A (in D#). It is a triad — the most fundamental chord type.
What is the difference between D# major and D# minor?
The D# major chord (D#–G–A#) uses a major third (4 semitones), giving it a bright, happy sound. The D# minor chord (D#–F#–A#) uses a minor third (3 semitones), giving it a darker, emotional sound.
What key does D#dim belong to?
D#dim naturally serves as the I chord in the key of D# major. It also appears as IV in the key of A# major, and as V in the key of G# major.
Can I play D#dim on ukulele?
Yes. The ukulele uses GCEA tuning with 4 strings. The D#dim chord notes (D#, F#, A) can be fretted on a ukulele, though the shapes differ from guitar due to the 4-string layout and shorter scale.
What chords go well with D#dim?
In the key of D# major, D#dim pairs naturally with G# major (IV), A# major (V), and Cm (vi). The classic I–IV–V (D#dim–G#–A#) is the foundation of blues, country, and rock.
What is a chord inversion of D#dim?
An inversion places a non-root note in the bass. D#dim root position: D# in bass. First inversion: F# in bass. Second inversion: A in bass. Inversions create smoother bass line movement without changing the harmony.
How do I memorize the notes in a diminished chord?
Remember the formula: 0–3–6 semitones from root. For D#dim: start on D#, add 3 semitones, then 6 semitones. Practicing this across all 12 roots builds instant recognition of any diminished chord.