Ab Guitar Chord
Ab Major · also written G# · Ab–C–Eb
Ab is the Ab major chord: Ab–C–Eb. Its sound is bright and resolved — the foundational happy sound of pop, rock, country, and folk. It's also written as G# — same notes, same shapes, different spelling.
You'll meet Ab constantly because it lives in several common keys: it's the I chord in Ab major, the IV chord in Eb major, and the V chord in Db major. That makes it a building block of I–IV–V and I–V–vi–IV progressions in those keys.
The most common way to play Ab is the barre shape at the 1st fret (4 3 1 1 1 x, low E string to high E string). Below you'll find 9 ways to play it across the neck, from open position to barre and shell voicings, with the theory behind the chord and the progressions it lives in.
How to Play Ab: 9 Voicings
Frets are listed from the low E string to the high E string. x = don't play that string, 0 = open string.
Ab Chord Theory
| Interval | R | 3 | 5 |
|---|---|---|---|
| Note | Ab | C | Eb |
Ab is built from the Ab major scale.
Ab Chord FAQ
What notes are in the Ab chord?
Ab contains 3 notes: Ab (R), C (3), Eb (5). The interval formula for a major chord is R–3–5.
What is the easiest way to play Ab on guitar?
Use the barre shape at the 1st fret: 4 3 1 1 1 x (frets listed from the low E string to the high E string, x = don't play that string). Ab has no open-position shape in standard tuning, so this movable form is the standard starting point.
What is the difference between Ab and Abm?
One note: the 3rd. Ab major uses the major 3rd (C) while Ab minor flattens it to B. That half-step is the entire difference between the bright major sound and the darker minor sound.
Is Ab the same as G#?
Yes. Ab and G# are enharmonic equivalents — the same pitch written two ways. Ab and G# use identical shapes and frets; which spelling you see depends on the key of the song.
What keys use the Ab chord?
Ab appears diatonically in Ab major (as I), Eb major (as IV), and Db major (as V) — plus F minor, its relative minor key.
Related Chords
Hear yourself play Ab
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