Studio 01 Diatonic harmony

Chords Helper

Dial in a key and explore the scale map, triad qualities, and full notation — sheet music, fretboard, and tab — the way you’d read a chart on the stand.

Pick a key

Now in C Major (Ionian)

01

Scales

Notes, formula, and notation for the selected scale. Change root or scale above anytime.

C Major (Ionian)

Heptatonic

C D E F G A B

Formula W,W,H,W,W,W,H

02

Diatonic chords

Every chord in the key with quality, formula, and performance-ready notation.

C

C – E – G

Quality
Major
Formula
1 - 3 - 5
Root
C
3rd
E
5th
G

D min

D – F – A

Quality
Minor
Formula
1 - ♭3 - 5
Root
D
3rd
F
5th
A

E min

E – G – B

Quality
Minor
Formula
1 - ♭3 - 5
Root
E
3rd
G
5th
B

F

F – A – C

Quality
Major
Formula
1 - 3 - 5
Root
F
3rd
A
5th
C

G

G – B – D

Quality
Major
Formula
1 - 3 - 5
Root
G
3rd
B
5th
D

A min

A – C – E

Quality
Minor
Formula
1 - ♭3 - 5
Root
A
3rd
C
5th
E

B dim

B – D – F

Quality
Diminished
Formula
1 - ♭3 - ♭5
Root
B
3rd
D
5th
F