Chord Inversion Calculator - Voicings & Inversions
Calculate chord inversions, identify bass notes, and explore voicings for any chord quality and root note.
Select a root note, chord quality, and inversion level to instantly see the chord's notes, bass note, and standard notation symbol.
Chord Inversion Calculator - Voicings & Inversions
Calculate chord inversions, identify bass notes, and explore voicings for any chord quality and root note.
About the Chord Inversion Calculator
Chord inversions are one of the most powerful tools in a musician's harmonic vocabulary. An inversion occurs when a note other than the root becomes the lowest pitch — the bass note — of a chord. By changing which note sits at the bottom, musicians can create smoother voice leading, richer textures, and more interesting bass lines without altering the harmonic identity of the chord itself.
Every chord has a root position and a number of inversions equal to the number of chord tones minus one. A triad has three tones, so it can appear in root position, first inversion, and second inversion. A seventh chord has four tones and adds a third inversion as well. This calculator handles all standard triad and seventh chord qualities: major, minor, diminished, augmented, dominant 7th, major 7th, and minor 7th.
In root position, the root note is in the bass. The chord sounds stable and grounded. Root position is the most common voicing in beginner settings, but relying on it exclusively produces a static, plodding bass line. First inversion places the third of the chord in the bass, creating a lighter, more mobile feel. Composers use first inversion to create a sense of forward motion or to connect two root-position chords smoothly. The slash notation, such as C/E for C major first inversion, directly communicates which note is in the bass.
Second inversion places the fifth in the bass. This voicing is unstable and typically functions as a passing chord or a cadential chord — the famous cadential 6-4 in classical harmony. Third inversion, available only for seventh chords, places the seventh in the bass and creates the most dissonant, tension-filled sound, demanding resolution.
The interval structure of an inverted chord differs from root position even though the pitch classes remain the same. This calculator shows the interval name from the bass note to each upper note, helping musicians understand the harmonic colour of each voicing. Learning to hear these interval structures is fundamental to ear training, music analysis, and improvisation.
Practical applications include piano accompaniment (using inversions for smooth left-hand patterns), guitar chord shapes (certain inversions are more ergonomic on the fretboard), and orchestration (distributing chord tones across instruments for optimal blend and voice leading). Jazz musicians rely heavily on inversions when comping to create varied and interesting harmonic textures beneath a soloist.
This calculator accepts any of the 12 chromatic root notes and seven common chord qualities, instantly computing the full set of notes, the bass note, and the chord symbol for any valid inversion level.
Chord Inversion Examples
Common inversions across different chord qualities, showing bass notes and standard slash notation.
| Chord / Inversion | Notes / Symbol | Use Case |
|---|---|---|
| C Major – Root Position | C – E – G | Symbol: C | Stable tonic chord; most common starting point. |
| C Major – First Inversion | E – G – C | Symbol: C/E | Lighter sound; connects I to IV smoothly. |
| A Minor – First Inversion | C – E – A | Symbol: Am/C | Common in descending bass lines (Am–Am/C–Am/E). |
| G Dominant 7th – Third Inversion | F – G – B – D | Symbol: G7/F | Maximum tension; resolves strongly to C major. |
How to Use the Chord Inversion Calculator
- Select the root note from the Root Note dropdown — all 12 chromatic pitches are available.
- Choose the chord quality that matches your harmonic intention: Major, Minor, Diminished, Augmented, or one of the three seventh chord types.
- Select the inversion level. Third Inversion is only enabled for seventh chord qualities (dom7, maj7, min7).
- Click Calculate to see the chord symbol, bass note, chord notes in inversion order, and interval structure from the bass.
- Click Reset to clear all selections and start with a fresh C major root position chord.
Chord Inversion FAQ
What is a chord inversion?
A chord inversion occurs when a note other than the root is placed in the bass (lowest position). Root position has the root on the bottom; first inversion has the third on the bottom; second inversion has the fifth on the bottom; and third inversion (for seventh chords) has the seventh on the bottom. The pitch classes of the chord remain the same — only the ordering changes.
How does slash notation like C/E work?
Slash chord notation indicates the chord name on the left of the slash and the bass note on the right. C/E means a C major chord with E in the bass, which is the first inversion. The notation is widely used in lead sheets, guitar chord charts, and piano arrangements to specify exactly which voicing the performer should use.
Why is second inversion considered unstable?
Second inversion places the fifth of the chord in the bass, creating a dissonant interval (a fourth) between the bass and the root above it. In tonal harmony, this sound demands resolution and is typically reserved for specific harmonic functions: the passing 6-4 (used as a transition), the pedal 6-4 (over a sustained bass), or the cadential 6-4 (preceding a dominant chord in a cadence).
Can I use third inversion for triads?
No. Third inversion requires a seventh chord because it places the seventh of the chord in the bass. Triads have only three tones (root, third, fifth) and therefore have only three possible voicings: root position, first inversion, and second inversion. The calculator automatically disables the third inversion option when a triad quality is selected.
How do chord inversions help with voice leading?
Voice leading is the practice of moving individual parts (voices) by the smallest possible intervals. Inversions allow the bass line to move stepwise or by small intervals rather than jumping between root positions. For example, a progression I–IV in C major moves the bass from C to F (a fourth). Using first inversion of IV (F/A) instead brings the bass from C to A (a third), creating a smoother connection.
Are inversions the same as chord voicings?
They are related but distinct concepts. Inversion specifically refers to which chord tone is in the bass. Voicing is a broader term that also encompasses the spacing between upper notes, which octave each note appears in, and which tones are doubled. Two chords can share the same inversion but differ in their voicing. This calculator determines the inversion but does not prescribe specific octave assignments for the upper voices.