semicord

Edim E diminished chord

Notes
E G Bb
Formula
1 b3 b5
Semitones
0 3 6 above the root
Other symbols
E°, Em(b5)

E to G is a minor third (3 semitones), G to Bb is a minor third (3 semitones). Two minor thirds stacked, so E to Bb is a tritone (6 semitones) instead of a perfect fifth. The four-note Edim7 and Em7b5 grow from it by adding a note on top.

Edim on the piano

C4D4E4F4G4A4B4C5D5E5F5G5A5B5C#4Eb4F#4Ab4Bb4C#5Eb5F#5Ab5Bb5C4EGBbC5

Root position from E4: E4, G4, Bb4. Middle C is C4.

Edim on the guitar

Standard tuning (E A D G B E). Strings run low E on the left to high e on the right, frets downwards; × is a muted string, ○ an open string, and each dot shows the note it sounds, with the root in blue-green. Every shape below has E as its lowest note.

EBbBbEEG××
Open position (E-shape)
0 1 2 0 x x (low E to high e)
Sounds E2 Bb2 E3 G3
7fr×EEBbBbEEGG×
A-shape barre, root on the A string at fret 7
x 7 8 9 8 x (low E to high e)
Sounds E3 Bb3 E4 G4

The barre shapes are movable: an E-shape chord's root is the note under your first finger on the low E string, an A-shape chord's root is the note on the A string. Slide the same grip up or down to play diminished chords on other roots.

Inversions of Edim

An inversion puts a note other than the root in the bass. The name is what semicord's chord finder calls those notes played bottom to top; a slash name like C/E means a C chord with E in the bass.

PositionNotes, bass firstNamedListen
Root positionE G BbEdim
1st inversionG Bb EEdim/G
2nd inversionBb E GEdim/Bb

Where Edim fits

Edim is vii° in F major, ii° in D minor, vii° in F minor. Its root E is the leading tone of F: a half step below the tonic, so the chord usually moves up to it.