A chord inversion is what happens when you reorganize a chord so that a note other than the root sits at the bottom. The chord doesn’t change — C major is still C major — but the lowest note does, which changes the sound and the way it connects to the chords around it.
To understand inversions fully, it helps to look at them separately for triads (3-note chords) and seventh chords (4-note chords), since each type has a different number of available positions.
The 1-3-5 Pattern (Works in Any Key)
Every chord is built from scale-degree numbers relative to its own root: 1 (root), 3 (third), 5 (fifth) — and 7 for seventh chords. Once you think in numbers instead of note names, inversions stop being something you memorize chord-by-chord and become a pattern you can apply to anything.
| Position | Number pattern |
|---|---|
| Root position | 1 – 3 – 5 |
| First inversion | 3 – 5 – 1 |
| Second inversion | 5 – 1 – 3 |
| Third inversion (7th chords only) | 7 – 1 – 3 – 5 |
The numbers just rotate — whatever was on the bottom moves to the top, and the next number in line drops into the bass. That’s the whole trick, and it works in any key.
On C major, 1-3-5 is C-E-G, 3-5-1 is E-G-C, 5-1-3 is G-C-E — the same shapes shown below.
The rule, stated directly:
- First inversion — the lowest-sounding note is the third of the chord.
- Second inversion — the lowest-sounding note is the fifth of the chord.
- Third inversion — the lowest-sounding note is the seventh of the chord (seventh chords only).
- If the bass note is not part of the chord at all, it isn’t a true inversion — it’s a slash chord. Example: C/F — F isn’t in C-E-G.
Triads: Three Positions
A triad has three notes — root, third, and fifth — which means it can sit in three different positions depending on which note is at the bottom.
C major — triads
Bass: C
Bass: E
Bass: G
Root Position
The root (the note the chord is named after) sits in the bass. This is the default form of any chord.
| Chord | Notes (low to high) | Bass note |
|---|---|---|
| C major | C – E – G | C |
| G major | G – B – D | G |
| Am | A – C – E | A |
First Inversion
The third of the chord moves to the bass. The root shifts up.
| Chord | Notes (low to high) | Bass note | Notation |
|---|---|---|---|
| C major | E – G – C | E | C/E |
| G major | B – D – G | B | G/B |
| Am | C – E – A | C | Am/C |
First inversions are the most common in practice. They create stepwise bass movement — instead of the bass jumping between chords, it steps smoothly from note to note.
Second Inversion
The fifth of the chord moves to the bass. Both root and third sit above it.
| Chord | Notes (low to high) | Bass note | Notation |
|---|---|---|---|
| C major | G – C – E | G | C/G |
| G major | D – G – B | D | G/D |
| Am | E – A – C | E | Am/E |
Second inversions feel less stable than first inversions. They’re often used as passing chords — a brief stop on the way between two more settled positions.
Seventh Chords: Four Positions
A seventh chord adds one more note to a triad — the seventh — which creates a fourth possible position: the third inversion.
The four notes of a seventh chord in order: root – third – fifth – seventh.
Cmaj7 — seventh chord
Bass: C
Bass: E
Bass: G
Bass: B
Root Position (Seventh Chords)
The root sits in the bass, same as with triads.
| Chord | Notes | Bass note |
|---|---|---|
| Cmaj7 | C – E – G – B | C |
| G7 | G – B – D – F | G |
| Am7 | A – C – E – G | A |
First Inversion
The third moves to the bass.
| Chord | Notes (low to high) | Bass note | Notation |
|---|---|---|---|
| Cmaj7 | E – G – B – C | E | Cmaj7/E |
| G7 | B – D – F – G | B | G7/B |
| Am7 | C – E – G – A | C | Am7/C |
Second Inversion
The fifth moves to the bass.
| Chord | Notes (low to high) | Bass note | Notation |
|---|---|---|---|
| Cmaj7 | G – B – C – E | G | Cmaj7/G |
| G7 | D – F – G – B | D | G7/D |
| Am7 | E – G – A – C | E | Am7/E |
Third Inversion
The seventh moves to the bass. This position only exists for seventh chords.
| Chord | Notes (low to high) | Bass note | Notation |
|---|---|---|---|
| Cmaj7 | B – C – E – G | B | Cmaj7/B |
| G7 | F – G – B – D | F | G7/F |
| Am7 | G – A – C – E | G | Am7/G |
Third inversions are the most harmonically tense. The seventh in the bass pulls strongly toward resolution, which makes them effective just before a cadence.
How to Read Slash Chord Notation
When a chord is written with a slash — C/E, G/B, D/F# — the letter before the slash is the chord, and the letter after is the bass note.
| Notation | Chord | Bass Note | What it means |
|---|---|---|---|
| C/E | C major | E | First inversion (3rd in bass) |
| C/G | C major | G | Second inversion (5th in bass) |
| G/B | G major | B | First inversion (3rd in bass) |
| G7/F | G dominant 7th | F | Third inversion (7th in bass) |
| D/F# | D major | F# | First inversion (3rd in bass) |
| Am/C | A minor | C | First inversion (3rd in bass) |
| Am/E | A minor | E | Second inversion (5th in bass) |
| C/F | C major | F | Not an inversion — F isn’t in C-E-G |
Not every slash chord is an inversion. A slash chord is only a true inversion when the bass note belongs to the chord. When it doesn’t — like C/F, where F isn’t part of C major — it’s still called a slash chord, but the bass note is an outside note (sometimes called a pedal tone) rather than one of the chord’s own notes. The notation looks identical either way; only the notes tell you which one you’re looking at.
How to Identify Any Chord’s Inversion in 3 Steps
- Find the lowest-sounding note. That’s the bass.
- Figure out the chord itself. Reorder the notes in your head until they sound like a chord you recognize.
- Compare the bass note to that chord. Is it the root, the third, the fifth, or (for seventh chords) the seventh? That tells you the inversion, using the 1-3-5 pattern above.
Worked example: you see the notes G-C-E. Reordered, that’s C-E-G — C major. The lowest note is G, which is the fifth of C. Second inversion — C/G.
The same process works for seventh chords, just with one more option to check: root, third, fifth, or seventh. To identify an inversion by ear, listen to the bass note first — does it sound like a stable anchor (root position), does it lean forward (first inversion), does it feel suspended (second inversion), or does it pull hard toward resolution (third inversion, seventh chords only)?
Inversion Reference Charts
Major and Minor Triads
| Chord | Root Position | First Inversion | Second Inversion |
|---|---|---|---|
| C major | C–E–G | C/E (E–G–C) | C/G (G–C–E) |
| G major | G–B–D | G/B (B–D–G) | G/D (D–G–B) |
| D major | D–F#–A | D/F# (F#–A–D) | D/A (A–D–F#) |
| F major | F–A–C | F/A (A–C–F) | F/C (C–F–A) |
| Am | A–C–E | Am/C (C–E–A) | Am/E (E–A–C) |
| Em | E–G–B | Em/G (G–B–E) | Em/B (B–E–G) |
| Dm | D–F–A | Dm/F (F–A–D) | Dm/A (A–D–F) |
Seventh Chords
| Chord | Root Position | 1st Inversion | 2nd Inversion | 3rd Inversion |
|---|---|---|---|---|
| Cmaj7 | C–E–G–B | Cmaj7/E | Cmaj7/G | Cmaj7/B |
| G7 | G–B–D–F | G7/B | G7/D | G7/F |
| Am7 | A–C–E–G | Am7/C | Am7/E | Am7/G |
| Dm7 | D–F–A–C | Dm7/F | Dm7/A | Dm7/C |
| Fmaj7 | F–A–C–E | Fmaj7/A | Fmaj7/C | Fmaj7/E |
Why Use Inversions?
1. Smooth Bass Movement
The main reason to use inversions is voice leading — making the bass line move by steps instead of leaps. When every chord change causes the bass to jump a large interval (a fourth, fifth, or more), the progression can sound disconnected. Inversions let you control the bass independently from the harmony, so it steps instead of leaping.
The classic example: add a descending bass line to a simple chord change.
Without inversions — C then Am — the bass jumps down a third. With an inversion in between:
C – C/B – Am – Am/G
The bass descends C → B → A → G, one step at a time. The chords barely change; the bass line does all the movement.
2. Stability Control
Each inversion has a different level of harmonic stability:
- Root position — most stable; strong arrival point
- First inversion — moderately stable; propels the music forward
- Second inversion — less stable; sounds like passing motion or suspended tension
- Third inversion — most tense (seventh chords only); demands resolution
By choosing which position a chord appears in, you control how settled or restless a moment feels.
3. More Variety from Fewer Chords
A four-chord progression can sound noticeably different just by inverting some of the chords — no new harmony needed. Inverting C to C/E between C and Am gives you an extra bass note and a smoother transition without touching the chord progression itself.
4. Bridging Between Chords (Pivot Tones)
Because an inversion changes only the bass note — not what chord it is — the same inverted chord can work as a hinge between two different chords that don’t otherwise connect smoothly.
Take C in second inversion: G-C-E, written C/G. Its bass note is G.
- C/G → G — the bass is already sitting on G, so moving to G major just confirms it as the root. The ear hears an arrival, not a jump.
- C/G → Am — the bass steps up a single note, G to A, instead of leaping straight from C to Am.
The same C/G chord can point toward two completely different destinations depending on what comes next. That flexibility is what makes second-inversion chords useful as pivots, not just passing tones.
Common Inversions to Learn First
These four appear constantly in pop, rock, and folk. Learn them first:
- G/B — first inversion of G major. Use it between C and Am, or whenever moving from G to a lower chord.
- D/F# — first inversion of D major. Use it between G and Em; the bass descends G → F# → E.
- C/E — first inversion of C major. Use it moving from C toward Am or Dm.
- Am/G — first inversion of Am (using G, the minor 7th, as a passing bass). Use it after Am to continue a descending bass: A → G → F.
Substitute each one for its root-position version in a familiar progression. The effect on the bass line is immediate.
FAQ
What is the difference between an inversion and a slash chord?
They often describe the same thing, but not always. A slash chord like C/E is a true inversion when the bass note (E) belongs to the chord. If the bass note doesn’t belong to the chord, it’s a pedal tone — written the same way, but harmonically different. Most slash chords you encounter in pop and rock are inversions.
Do inversions change a chord’s harmonic function?
Not fundamentally. C major functions as the I chord in root position, first inversion, or second inversion. What changes is stability — how settled or tense the chord feels. Root position is most stable; second inversion least; third inversion (seventh chords) the most tense.
What is the most common chord inversion?
First inversion, by a large margin. G/B, D/F#, and C/E are the three most frequently encountered inversions in pop and rock. They’re used because they create stepwise bass movement, which most progressions benefit from.
When should I use root position instead of an inversion?
When you want a strong, definitive arrival — like the final chord of a song or the first chord of a new section. Root position delivers maximum harmonic weight. If a progression feels unstable or unresolved, too many consecutive inversions is often the reason.
Can any chord be inverted?
Yes. Every chord with more than one note has at least one inversion. Triads have two (first and second). Seventh chords have three (first, second, and third). Extended chords (ninths, elevenths) can also be inverted, though in practice they usually appear with the root or third in the bass to keep the harmony clear.
How many chord inversions are there?
A chord always has one fewer inversion than it has notes. Triads (3 notes) have 2 inversions — first and second — for 3 total positions. Seventh chords (4 notes) have 3 inversions for 4 total positions.
Is there a fourth inversion?
Not for a seventh chord — there are only four notes to put in the bass (root, third, fifth, seventh), so third inversion is the last one. A “fourth inversion” only becomes possible on 5-note extended chords like ninth chords, and it’s rare in practice.
How do you practice chord inversions?
Take a chord you already know and play it in every inversion in a row — root, first, second, and third if it’s a seventh chord — so your ear learns what each one sounds like. Then apply it: swap one root-position chord in a familiar progression for its inversion and listen to what changes in the bass line.
Further reading: Inversion (music) — Wikipedia · Voice leading — Wikipedia · Circle of Fifths