How do I find a chord in a specific key?

Choose your tonic, then search or filter the chord list to open a chord details page with diagrams and interval information.

What can I use the chord library for?

Use the chord library as a quick reference for chord names, aliases, and practical details before practice, songwriting, or arrangement.

Chord Library - Select a chord

Find new chords in the extensive chord library. Examples on how to construct and play nearly any chord you can think of are included in the pages. You will also find cheat sheets with sheet music, piano chords and guitar chords in any key.

Quick-select chord families

Major Minor Dominant 7 Diminished Augmented Suspended

Featured chords in A

Sheet music of C Major in three octaves (3)

Sheet music of C Major in three octaves (2)

A Major

Major triad (1-3-5); stable tonic color and foundation of tonal harmony.

View

A Minor

Minor triad (1–♭3–5); stable minor color, relative to major by lowering the third.

View

Guitar voicing #4 of the C Minor seventh chord

A Minor seventh

Minor seventh (1–♭3–5–♭7): the everyday minor-seventh stack behind ii7, i7 vamps, and R&B shells—not the major-seventh minor color of mM7.

View

Guitar voicing #1 of the C Major seventh chord

A Major seventh

Major seventh (1–3–5–7); stable major color with leading-tone pull to the octave.

View

Sheet music of C Augmented in three octaves (3)

A Augmented

Augmented triad (1–3–♯5); symmetric stacks and whole-tone color.

View

Guitar voicing #2 of the C Dominant ninth chord

A Dominant ninth

Dominant seventh with added ninth; richer dominant tension that still resolves strongly to tonic.

View

	Aliases
A Minor	m, min, -	Beginner
A Minor seventh	m7, min7, mi7, -7	Beginner
A Minor major seventh	m/ma7, m/maj7, mM7, mMaj7, m/M7, -Δ7, mΔ, -^7, -maj7	Easy
A Minor sixth	m6, -6	Easy
A Minor seventh add eleventh	m7add11, m7add4	Easy
A Minor seventh flat fifth	m7b5, ø, -7b5, h7, h	Easy
A Minor ninth	m9, -9	Easy
A Minor add ninth	madd9	Easy
A Minor ninth flat fifth	m9b5	Easy
A Minor eleventh	m11, -11	Easy
A Minor ninth sharp fifth	m9#5	Intermediate
A Minor sharp fifth	m#5, -#5, m+	Intermediate
A Minor add fourth	madd4	Intermediate
A Minor six-nine	m69, -69	Intermediate
A Minor eleventh augmented	m11A	Intermediate
A Minor thirteenth	m13, -13	Expert
A Minor seventh sharp fifth	m7#5	Expert
A Minor major ninth	mM9, mMaj9, -^9	Guru
A Minor major seventh flat sixth	mMaj7b6	Guru
A Minor major ninth flat sixth	mMaj9b6	Guru
A Minor flat sixth major seventh	mb6M7	Guru

Chord library for practical music theory and harmony

Use this chord library to study chord formulas, chord quality, inversions, extensions, and common aliases in every key. Each chord page helps you understand the intervals and notes inside the chord so you can apply harmony with confidence.

Start with essential triads and seventh chords, then continue into altered and extended harmony for songwriting, improvisation, and arranging. For a complete workflow, combine this library with the scale libraryand the interval guideto hear how harmony and melody connect in real music.