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New Released in April 2026
Diminished Chords Chart
This diminished chords chart lists all 12 roots with their notes, for piano and guitar. Remember one rule and you can build them yourself: minor chord with the top note one key lower.
No account, no download. The demo has limited content. Advanced features are in ChordRunner Premium.
- MIDI keyboard
- Digital or acoustic piano
- Guitar
- Computer, phone or tablet
Diminished chords: notes and guitar shapes
How to read it: the chord name on the left, its notes from the bottom up, then a guitar shape (x = do not play, 0 = open string). Click a chord for its full page.
| Chord | Notes | Guitar |
|---|---|---|
| Cdim | C Eb Gb | x3454x |
| Cdim7 | C Eb Gb Bbb | – |
| C#dim | C# E G | x4565x |
| C#dim7 | C# E G Bb | – |
| Ddim | D F Ab | x5676x |
| Ddim7 | D F Ab Cb | – |
| Ebdim | Eb Gb Bbb | x6787x |
| Ebdim7 | Eb Gb Bbb Dbb | – |
| Edim | E G Bb | x7898x |
| Edim7 | E G Bb Db | – |
| Fdim | F Ab Cb | 1x310x |
| Fdim7 | F Ab Cb Ebb | – |
| F#dim | F# A C | 2x421x |
| F#dim7 | F# A C Eb | – |
| Gdim | G Bb Db | 3x532x |
| Gdim7 | G Bb Db Fb | – |
| Abdim | Ab Cb Ebb | 4x643x |
| Abdim7 | Ab Cb Ebb Gbb | – |
| Adim | A C Eb | 5x754x |
| Adim7 | A C Eb Gb | – |
| Bbdim | Bb Db Fb | x1232x |
| Bbdim7 | Bb Db Fb Abb | – |
| Bdim | B D F | x2343x |
| Bdim7 | B D F Ab | – |
- Only white keys: Bdim.
- Starting on a black key: C#dim, C#dim7, Ebdim, Ebdim7, F#dim, F#dim7, Abdim, Abdim7, Bbdim, Bbdim7.
Learn the chart by playing it
A chart helps you look chords up; playing them makes you remember them. In ChordRunner C#dim7, Ddim, Ddim7 and the rest of this chart come at you in random order, on a MIDI keyboard or a piano or guitar by microphone.
Play the demoCommon questions
How do I build diminished chords?
Use the rule: minor chord with the top note one key lower. Start on any key and count the keys, black and white, to find the other notes.
Which diminished chords should I learn first?
Start with Cdim, Cdim7, C#dim, then the others in the order you meet them in songs you like. All 12 follow the same pattern.
Can I practise this chart with a MIDI keyboard or a guitar?
Yes. ChordRunner shows these chords in random order and hears a USB MIDI keyboard, or a piano or guitar through the microphone.
Do I need to memorise the whole chart?
Not at once. Learn the rule and three chords, then add one or two a week. Playing them in random order fixes them far faster than rereading the chart.
Your instrument is the controller.
ChordRunner is a browser game that teaches piano and guitar chords: a chord appears on screen, you play it on a real instrument, and your runner jumps. MIDI keyboard or microphone, both work.
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