I-IV-V (the Three Chord Trick)
I · IV · V
The most fundamental progression in Western music.
Key of Ab
The Key of A♭ Major
The chords in the key of A♭ major are A♭, B♭m, Cm, D♭, E♭, Fm and Gdim.
Warm, slightly veiled, pianist-friendly.
Below: all seven diatonic chords with guitar shapes and audio, the scale, the key signature (B♭ · E♭ · A♭ · D♭), 8 progressions already transposed into this key, and the keys next door.
Diatonic chords
The 7 chords in the key of A♭ major
Each degree of the A♭ major scale carries one chord. Roman numerals show the degree; the function column tells you what the chord does. Every name links to its full chord page — press play to hear it on guitar.
| Degree | Function | Chord | Guitar shape | Hear it |
|---|---|---|---|---|
| I | TonicTonicHome — rests | A♭A♭ · C · E♭ | ||
| ii | SubdominantSupertonicDeparts — sets up the V | B♭mB♭ · D♭ · F | ||
| iii | TonicMediantHome — rests | CmC · E♭ · G | ||
| IV | SubdominantSubdominantDeparts — sets up the V | D♭D♭ · F · A♭ | ||
| V | DominantDominantPulls back to I | E♭E♭ · G · B♭ | ||
| vi | TonicSubmediantHome — rests | FmF · A♭ · C | ||
| vii° | DominantLeading tonePulls back to I | GdimG · B♭ · D♭ |
Want the same chords on another instrument? Every chord page carries piano, ukulele, bass, mandolin and banjo shapes — start with piano.
Character
Why songs live in A♭ major
Four flats put most of Ab major on the black keys, so it falls comfortably under a pianist's hand and awkwardly under a guitarist's. Gospel, soul ballads and late-Romantic piano writing all favour it because the register sounds warm rather than bright. On guitar, capo at the first fret and play G shapes.
Scale
The A♭ major scale
Seven notes, in order from the tonic. Tap any note to hear it, or play the whole scale ascending.
Fretboard patterns and full scale reference: Ab Major (Ionian).
Key signature
The A♭ major key signature
B♭ · E♭ · A♭ · D♭
A♭ major is written with 4 flats. Every B, E, A and D in the music is played flat unless an accidental says otherwise. Its relative minor, F minor, shares this signature exactly.
Progressions
Chord progressions in A♭ major
The most-used progressions, already transposed into A♭ major. Every chord links to its own page; the progression name opens the full breakdown.
I-V-vi-IV (the Pop Punk Progression)
I · V · vi · IV
The 4-chord pop progression that powers thousands of hits.
vi-IV-I-V (Sensitive Female)
vi · IV · I · V
The minor-flavored sibling of I-V-vi-IV.
I-vi-IV-V (the Doo-Wop)
I · vi · IV · V
The 1950s ballad backbone.
I-IV-I-V
I · IV · I · V
Classic 4-bar phrase with a leading-tone pull on bar 4.
I-♭VII-IV (Mixolydian Rock)
I · ♭VII · IV
Mixolydian flavor; classic rock pull.
12-Bar Blues
I · I · I · I · IV · IV · I · I · V · IV · I · V
The defining blues form. 4 bars I, 2 bars IV, 2 bars I, 1 bar V, 1 bar IV, 1 bar I, 1 bar V (turnaround).
8-Bar Blues
I · V · IV · IV · I · V · I · V
Compressed blues form.
FAQ
Questions about the key of A♭ major
- What chords are in the key of Ab major?
- The key of Ab major contains seven diatonic chords: Ab (I), Bbm (ii), Cm (iii), Db (IV), Eb (V), Fm (vi), Gdim (vii°). Most songs in Ab major lean on Ab, Db and Eb — the tonic, subdominant and dominant.
- What is the relative minor of Ab major?
- F minor is the relative minor of Ab major. Both keys share the same key signature (4 flats) and exactly the same seven notes — F minor simply treats F as home instead of Ab, which is why you can borrow chords freely between them.
- What are the easiest chords in Ab major to play on guitar?
- Ab major has no open guitar shapes — every diatonic chord needs a barre or a movable grip in standard tuning. Most guitarists capo and play open shapes from an easier key instead.
Learn the theory
Read up on A♭ major
This page is the reference. These are the guides that explain how a key works in the first place — read one and the table above stops needing to be looked up.