How do I find a chord I'm hearing?

Use the Chord Finder — click the notes you hear on the piano keyboard and the tool will identify the most likely chord (with inversions and enharmonic alternatives). For pure chord theory, browse this library by root and quality.

What are inversions and which one should I use?

Inversions reorder the same chord notes so a different one is the bass. First inversion puts the third lowest, second inversion puts the fifth lowest. Use them for smoother voice leading between chords — close inversions sound less jumpy than always playing root position.

Why so many chord types?

Pop and rock often use only major / minor / 7. Jazz and contemporary writing draw from extended (9, 11, 13), altered (dim, aug, sus, add) and slash chords. The library covers all of them so you can hear and finger any voicing you encounter on a chart.

Chord Library

Browse every chord in every key with interactive piano and guitar diagrams, notes, progressions and audio playback.

All chords by quality

Click any chord to open its page with a full piano diagram, guitar fingering, progressions and audio.

Major

1 · 3 · 5

Minor

1 · ♭3 · 5

Dominant 7

1 · 3 · 5 · ♭7

Major 7

1 · 3 · 5 · 7

Minor 7

1 · ♭3 · 5 · ♭7

Diminished

1 · ♭3 · ♭5

Augmented

1 · 3 · ♯5

Suspended 2

1 · 2 · 5

Suspended 4

1 · 4 · 5

Half-Diminished (m7♭5)

1 · ♭3 · ♭5 · ♭7

Power Chord (5)

1 · 5

Major 6

1 · 3 · 5 · 6

Minor 6

1 · ♭3 · 5 · 6

Diminished 7

1 · ♭3 · ♭5 · °7

Minor Major 7

1 · ♭3 · 5 · 7

Dominant 7 sus4

1 · 4 · 5 · ♭7

Added 9

1 · 3 · 5 · 9

Dominant 9

1 · 3 · 5 · ♭7 · 9

Major 9

1 · 3 · 5 · 7 · 9

Minor 9

1 · ♭3 · 5 · ♭7 · 9

Explore more music tools

Master chords, scales, progressions and keys with our comprehensive music theory library and interactive tools.

Explore scales Explore progressions Chord Transposer Chord Finder Try the Piano Open Circle of Fifths

Frequently asked questions

How do I find a chord I'm hearing?: Use the Chord Finder — click the notes you hear on the piano keyboard and the tool will identify the most likely chord (with inversions and enharmonic alternatives). For pure chord theory, browse this library by root and quality.
What are inversions and which one should I use?: Inversions reorder the same chord notes so a different one is the bass. First inversion puts the third lowest, second inversion puts the fifth lowest. Use them for smoother voice leading between chords — close inversions sound less jumpy than always playing root position.
Why so many chord types?: Pop and rock often use only major / minor / 7. Jazz and contemporary writing draw from extended (9, 11, 13), altered (dim, aug, sus, add) and slash chords. The library covers all of them so you can hear and finger any voicing you encounter on a chart.