How to create diatonic chords in A major scale?
A Major Scale
First, let’s look at the A major scale. A – B – C♯ – D – E – F♯ – G♯ – A are the notes of the A major scale.
Diatonic chords are formed by stacking two generic third notes above each scale note.
A Major Diatonic Chords
These are the seven major scale diatonic chords that come from the A major scale.
Each major scale diatonic chord is labelled with a roman numeral number:
All major scales follow this chord quality pattern:
I, ii, iii, IV, V, vi, viiº
We use uppercase roman numeral numbers to represent major chords, lowercase to represent minor chords, uppercase with a small plus sign to represent augmented chords, and lowercase with a small circle to represent diminished chords.
First, fourth and fifth chords in major scale will always be major chords. Second, third and sixth chords will always be minor chords. Seventh chord will always be diminished chord.
The seven diatonic chords in the A major key are:
I. A – C♯ – E (A major chord)
ii. B – D – F♯ (B minor chord)
iii. C♯ – E – G♯ (C Sharp minor chord)
IV. D – F♯ – A (D major chord)
V. E – G♯ – B (E major chord)
vi. F♯ – A – C♯ (F Sharp minor chord)
viiº. G♯ – B – D (G Sharp diminished chord)
These are the chords that harmonize the A major scale.
Major Scale Diatonic Chords
Diatonic Chords in C Major Scale
Diatonic Chords in C Sharp Major Scale / D Flat Major Scale
Diatonic Chords in D Major Scale
Diatonic Chords in E Flat Major Scale
Diatonic Chords in E Major Scale
Diatonic Chords in F Major Scale
Diatonic Chords in F Sharp Major Scale / G Flat Major Scale
Diatonic Chords in G Major Scale
Diatonic Chords in A Flat Major Scale
Diatonic Chords in A Major Scale
Diatonic Chords in B Flat Major Scale
Diatonic Chords in B Major Scale / C Flat Major Scale
Piano Chord Progression Poster
This practical piano chord progression poster from Amazon is the perfect reference chart of all 24 major and minor chord sets — The Really Useful Piano Chord Progression Poster – A1 Size – Folded Version
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Piano Music Theory 