Chord Inversions: First, Second, and Third Inversions + Slash Chords

A chord inversion is what you get when you play the same notes of a chord but put a note other than the root in the bass. The notes themselves do not change — C major is still C, E, and G no matter what — what changes is which note sits on the bottom. That single change reshapes the chord's emotional color and the way it connects to the chords around it. Inversions are the bridge from "I know my chords" to "I understand voice leading," and they unlock the slash-chord symbols you see on every lead sheet (C/E, G/B, C/G).

A triad has three notes (root, third, fifth), so it has three possible bass notes and therefore three positions. Root position puts the root in the bass (C–E–G, written C). First inversion puts the third in the bass (E–G–C, written C/E). Second inversion puts the fifth in the bass (G–C–E, written C/G). Seventh chords add a fourth possibility — third inversion — with the seventh in the bass (for C7, that is C7/B♭). The number after the slash always names the bass note, and the letter before the slash names the chord. So G/B means "a G major chord with a B in the bass."

Why do inversions matter? Because the bass line is the foundation of harmonic motion, and inversions let you write a bass line that moves by step instead of jumping around. A progression like C → G → Am has a bass that jumps C–G–A; swap in C → G/B → Am and the bass now walks C–B–A — smooth, melodic, and resolvent. This is why inversions are everywhere in pop, folk, soul, and jazz: they turn a sequence of block chords into a flowing musical line. The classic "first inversion walk-up" (C → C/E → F) and the soul-music G/B → C cadence are both inversions doing voice-leading work.

Work through the four sections below in order. Section 1 demonstrates the three positions of C major with audio so you can hear how the same three notes rearrange. Section 2 is the slash-chord notation table — every common symbol you will meet on a lead sheet. Section 3 walks through two real progressions that use inversions for bass motion. Section 4 explains when to choose an inversion and when to stay in root position. Finish with the inversion-identification quiz to test whether you can read a slash chord and name its position on sight.