Chord Formula Cheat Sheet
| Chord Type | Symbol | Intervals | Example (C) |
|---|---|---|---|
| Major Triad | C | 1 – 3 – 5 | C – E – G |
| Minor Triad | Cm | 1 – ♭3 – 5 | C – E♭ – G |
| Dominant 7th | C7 | 1 – 3 – 5 – ♭7 | C – E – G – B♭ |
| Major 7th | Cmaj7 | 1 – 3 – 5 – 7 | C – E – G – B |
| Minor 7th | Cm7 | 1 – ♭3 – 5 – ♭7 | C – E♭ – G – B♭ |
| Diminished 7th | Cdim7 | 1 – ♭3 – ♭5 – ♭♭7 | C – E♭ – G♭ – A |
| Inversions | |||
| 1st Inversion | C/E | 3rd in bass | E – G – C |
| 2nd Inversion | C/G | 5th in bass | G – C – E |
| 3rd Inv. (7th) | C7/B♭ | 7th in bass | B♭ – C – E – G |
| Diatonic formula | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Major scale | 1 | 2m | 3m | 4 | 5 | 6m | 7° |
| Minor scale | 1m | 2° | 3 | 4m | 5m | 6 | 7 |
m = minor · ° = diminished · plain number = major. Add 7 for 7th chords (e.g. 2m → 2m7).