The E Diminished chord is a three-note chord made up of E, G, and B♭. It is built from a root, minor third, and diminished fifth.
Construction
| Note | Interval | Degree |
|---|---|---|
| E | Root | 1 |
| G | Minor 3rd | ♭3 |
| B♭ | Diminished 5th | ♭5 |
E Diminished Inversions


| Position | Notes |
|---|---|
| Root Position | E – G – B♭ |
| 1st Inversion | G – B♭ – E |
| 2nd Inversion | B♭ – E – G |
Key Signature
A Diminished chord is built from symmetrical or ambiguous intervals, so it doesn’t belong to a single key and has no key signature of its own.
How E Diminished functions in a key
The same chord takes on a different harmonic role depending on the key it appears in. Here is where E Diminished sits diatonically across the common keys:
- In F major, E Diminished is the vii° chord — the dominant.
- In D minor, E Diminished is the ii° chord — a predominant.