A chord inversion is the same chord with a different note in the bass: root position has the root lowest, first inversion has the 3rd lowest, and second inversion has the 5th lowest. C major in root position is C, E, G; in first inversion it is E, G, C; in second inversion it is G, C, E.
What are chord inversions?
A chord inversion is the same chord with its notes rearranged so that a different note is the lowest. The notes themselves never change, only their order from bottom to top. C major is always C, E and G, but in root position the C is lowest, in first inversion the E is lowest, and in second inversion the G is lowest. The chord sounds like C major in all three cases, but each inversion has a different colour and a different job: root position sounds the most stable, first inversion sounds lighter and more mobile, and second inversion sounds the most open and the least settled. Inversions matter because real music rarely jumps from one root-position chord to another. Smooth bass lines come from inversions: when the harmony moves from C to G, a first-inversion G chord, with B in the bass, lets the bass walk up by step, C to B to C, instead of leaping. Pianists use inversions constantly to keep their hands in one place, guitarists use them to find new voicings up the neck, and composers use them to shape the direction of a bass line. Learning inversions is the step that turns chord shapes into real harmony.
How inversions work
For a triad there are three positions, named by which note is in the bass. Root position has the root lowest: C, E, G. First inversion has the 3rd lowest: E, G, C. Second inversion has the 5th lowest: G, C, E. The figured-bass numbers from classical theory describe the intervals above the bass note: root position is 5/3, first inversion is 6/3 (usually shortened to 6), and second inversion is 6/4. For a 7th chord there are four positions: root position, first inversion (3rd in the bass), second inversion (5th in the bass) and third inversion (7th in the bass). The rule for building an inversion is simple: take the lowest note and move it up an octave. Start with C, E, G in root position and move the C up an octave to get E, G, C, the first inversion. Move the E up an octave to get G, C, E, the second inversion. Move the G up to get C, E, G again, an octave higher. The same trick works for any chord, including 7th chords: G7 in root position is G, B, D, F, and moving the G up gives B, D, F, G, the first inversion. The C major piano chord and the G7 piano chord show inversions on piano, and the chord inverter builds every inversion of any chord.
Worked example — F major inversions. F major is F, A and C. Root position is F, A, C, with F in the bass. First inversion is A, C, F, with A in the bass. Second inversion is C, F, A, with C in the bass. On piano, play root position with your right hand while your left hand plays the bass note, then move the bass note through F, A and C while the right hand stays still: the harmony stays F major throughout, but the bass line walks. On guitar the F major guitar chord is usually played as a barre chord, and its inversions appear as smaller shapes up the neck. The key of F major shows where F major belongs.
How to practise chord inversions
Practise inversions as bass-line movements, not as isolated shapes. The point is the smooth connection between chords.
- On piano, play the C major triad in root position, first inversion and second inversion, moving the lowest note up an octave each time.
- Play C, G/B, Am, a I–V–vi movement in C major where the G chord is in first inversion, and listen for the bass stepping down C, B, A.
- On guitar, find the C major guitar chord triad on the top three strings, then move the same three notes to different string sets to find the inversions.
- Play the I–V–vi–IV progression in C major using only inversions that keep the notes within one octave on piano.
- Use the chord inverter to check every inversion of a chord before you practise it, so you are sure of the bass note.
Common mistakes
- Thinking an inversion is a different chord — C, E, G and E, G, C contain exactly the same notes, so they are the same chord. The inversion changes the bass note and the colour, not the identity of the chord.
- Using second inversion at the end of a phrase — Second-inversion chords sound unstable and are usually used as passing chords, not as final chords. Ending a phrase on a second-inversion chord sounds unfinished, like a sentence without a full stop.
- Jumping between root positions — Playing every chord in root position makes the bass leap around and the harmony sound blocky. Inversions exist to smooth the bass line, so use them whenever two chords are close together.
Quick reference
The three positions of a triad are easiest to compare on a single chord, because then the notes never change and only their order does. This table lists the C major triad in root position, first inversion and second inversion, and the bass note column shows the one note that decides which position you are looking at.
| Position | Notes (C major) | Bass note |
|---|---|---|
| Root position | C – E – G | C |
| First inversion | E – G – C | E |
| Second inversion | G – C – E | G |
Practise the table on piano by playing the three positions with your right hand while your left hand plays the bass note from the third column, and listen for the way the chord lightens as the bass rises. On guitar, find the same three note sets on the top three strings, and notice how each inversion sits under the fingers differently.
Frequently asked questions
What is a chord inversion?
An inversion is the same chord with a different note lowest. A triad has three positions: root position with the root in the bass, first inversion with the 3rd in the bass, and second inversion with the 5th in the bass. The notes are identical; only their order changes.
How many inversions does a triad have?
Three positions in total: root position plus two inversions. A 7th chord has four positions, because it has four notes, and the extra one is third inversion, with the 7th in the bass.
Why use inversions instead of root position?
For smoother bass lines, for easier hand positions on piano, and for new colours on guitar. Inversions let the bass move by step instead of leaping, which makes progressions sound connected rather than blocky.
Does an inversion change the chord's name?
No. The chord keeps its name: E, G, C is still a C major chord, just in first inversion. Some musicians write it as a slash chord, C/E, to show the bass note, but the chord itself is unchanged.
Are inversions harder on guitar than on piano?
Usually yes, because guitar shapes are fixed by the tuning, while piano notes can be rearranged freely. Guitarists often play partial inversions, using only three strings, rather than the full four- or five-note shapes.