Chord Inversions Explained: Root Position, 1st, 2nd & 3rd

A chord inversion is just a rearrangement of a chord's notes so that something other than the root is at the bottom. Same notes, different order — but the effect on voice leading and harmonic colour is significant.

What is root position?

Root position is the "default" way a chord is written and thought of: the root note is at the bottom (in the bass). A C major chord in root position has C at the bottom, with E and G above it: C – E – G.

Root position chords sound solid and resolved. When you want maximum stability and finality — the end of a phrase, the last chord of a song — root position is almost always the right choice.

The three inversions (for triads)

In first inversion, the third of the chord is in the bass. For C major, that's E at the bottom: E – G – C. First inversion sounds lighter and less settled than root position — it's often used as a passing chord because the bass note (the third) wants to move by step.

In second inversion, the fifth is in the bass. For C major: G – C – E. Second inversion is the most unstable of the three — in classical harmony it's treated almost as a dissonance that needs to resolve. The "cadential 6/4" (second inversion of the tonic chord before a dominant) is one of the most iconic harmonic gestures in classical music.

Third inversion (for seventh chords)

Seventh chords have four notes, which gives them a third inversion: the seventh is in the bass. For Cmaj7 (C – E – G – B), third inversion puts B at the bottom: B – C – E – G. Third inversion seventh chords are unstable and typically used as passing chords with strong motion to the next harmony.

Why inversions matter: voice leading

Voice leading is the art of moving smoothly between chords — minimising the distance each note has to travel. Inversions are the main tool for achieving this. Compare these two ways of playing C major → F major:

Root position only: C–E–G → F–A–C. The top note jumps up a minor third, the middle note jumps up a major third, the bottom note jumps up a perfect fourth. Clunky, lots of movement.

With first inversion: C–E–G → C–F–A (F major, first inversion). The C stays in place. E moves up one semitone to F. G moves up a whole step to A. Smooth, minimal movement — this is good voice leading.

Inversions in bass lines

In pop, rock, and jazz notation, inversions are written with a slash: C/E means "C major chord with E in the bass" (first inversion). G/B means "G major with B in the bass" — another first inversion used constantly in pop as a bass line connector between C and Am or C and G.

Famous examples of slash chords (inversions) in pop: the descending bass line in "Let It Be" (C – G/B – Am – F), the opening of "With or Without You," almost any song with a smooth bass walk under a static harmony.

Practise spotting inversions

Next time you're learning a song on piano, notice which chord tones are in the bass. If the chord is G major and the bass note is B, you're in first inversion — the guitarist might just play a G chord, but the pianist or bassist is voicing it with more colour. Use the MusoKit chord finder to explore chord voicings and see how the same chord looks in different positions.