307 named progressions, from I–V–vi–IV to the 12-bar blues and the Andalusian cadence, in any key and with any capo.
In G major, the 12-bar blues is G7 | G7 | G7 | G7 | C7 | C7 | G7 | G7 | D7 | C7 | G7 | D7. The 12-bar blues: four bars of I, two of IV, two of I, then V–IV–I and a V turnaround. The base of blues, rock and roll and much of jazz.
The library above is set to 12-Bar Blues in G major. Press Play to hear it with strummed guitar, bass and drums in a blues shuffle groove, tap any chord to hear it on its own, or pick another key or a capo.
| Numeral | Chord | Notes | What it does |
|---|---|---|---|
| I7 | G7 dominant seventh | G B D F | tonic (home) |
| IV7 | C7 dominant seventh | C E G B♭ | predominant (moving away) |
| V7 | D7 dominant seventh | D F♯ A C | dominant (pulling home) |
Chords that share notes slide into each other; a change with no common notes sounds like a bigger step. Here is what each change keeps:
The easiest shape for each chord, with finger numbers. All of them are open-position shapes.
No capo needed: in G major the shapes without a capo are already easy. Each row shows the shapes you play and how easy they are (capo positions above the 7th fret are left out: the guitar sounds thin up there).
| Capo | Shapes you play | How easy |
|---|---|---|
| 5th fret | D7 G7 A7 | Very easy |
| No capo | G7 C7 D7 | Very easy |
| 3rd fret | E7 A7 B7 | Easy |
| 7th fret | C7 F7 G7 | Hard |
G7, C7 and D7, played G7 | G7 | G7 | G7 | C7 | C7 | G7 | G7 | D7 | C7 | G7 | D7.
You don’t need one: in G the shapes without a capo are already easy.
Keep the numerals (I7, IV7, V7) and build each chord from the new key, or tap another key in the library above and the chords change for you.
E minor. It has the same notes as G major, so Em (the vi chord) sounds at home in G progressions.