Chord reference · triad
Ab chord (A-flat major)
Ab is the A-flat major chord. Play A♭, C, E♭ together to hear the chord in root position.
Ab chord notes and interval formula
The formula 1–3–5 means the chord is measured from A♭ using the root, major third, and perfect fifth. In semitone numbers from the root, the pattern is 0–4–7.
| Degree | Interval | Semitones | Note |
|---|---|---|---|
| 1 | Root | 0 | A♭ |
| 3 | Major Third | 4 | C |
| 5 | Perfect Fifth | 7 | E♭ |
How to play Ab on piano
Start with the notes in root position from low to high: A♭ – C – E♭. Right hand 1–3–5; left hand 5–3–1 is a useful starting point, but black-key combinations and melodic movement may make another fingering more comfortable.
For a cleaner accompaniment, place the root in the left hand and play the remaining tones in the right. With extended chords, keep the third and seventh because they identify the chord quality most clearly.
How to play Ab on guitar
Try the shape 4-3-1-1-1-4 in standard tuning, read from low E to high E. The sounding-string details are: E fret 4: A♭; A fret 3: C; D fret 1: E♭; G fret 1: A♭; B fret 1: C; E fret 4: A♭. Keep every note clear and release pressure from strings marked “x.”
This is one voicing, not the only correct shape. The chord remains Ab whenever the essential pitch classes are present; doubling, omission, and bass-note choice change the voicing rather than the basic chord name.
Ab inversions and slash chords
Inversions keep the same notes but place a different chord tone in the bass. They are useful for smoother bass lines, compact keyboard movement, and alternative guitar voicings.
| Position | Symbol | Notes low to high | Bass |
|---|---|---|---|
| Root position | Ab | A♭ – C – E♭ | A♭ |
| 1st inversion | Ab/C | C – E♭ – A♭ | C |
| 2nd inversion | Ab/Eb | E♭ – A♭ – C | E♭ |
What Ab sounds like and where it fits
The A-flat major chord is clear and stable. Major triads are the basic stable chords of tonal music. This one can act as a tonic in its own major key, a dominant in a key a perfect fourth higher, or a subdominant in a key a perfect fifth higher.
Ab compared with similar chords
Small interval changes create different chord names. Use this table to avoid confusing Ab with nearby structures.
| Chord | Quality | Formula | Notes |
|---|---|---|---|
| Abm | Minor | 1–♭3–5 | A♭, C♭, E♭ |
| Abmaj7 | Major Seventh | 1–3–5–7 | A♭, C, E♭, G |
| Ab7 | Dominant Seventh | 1–3–5–♭7 | A♭, C, E♭, G♭ |
Frequently asked questions
What notes are in the Ab chord?
The Ab chord contains A♭, C, E♭. Its interval formula is 1–3–5.
How do you play Ab on piano?
Play A♭, C, E♭ together. A practical root-position fingering is right hand 1–3–5; left hand 5–3–1; adjust the fingering to your hand and musical context.
How do you play Ab on guitar?
One compact standard-tuning shape is 4-3-1-1-1-4 from the low E string to the high E string. An “x” means mute that string.
What does the symbol Ab mean?
The root is A♭. The suffix major identifies a major structure with the formula 1–3–5.
How many inversions does Ab have?
A 3-note chord has 3 closed-position arrangements when every chord tone is retained: root position plus 2 inversions. Extended practical voicings may omit notes.