Ukulele Scales & Modes Lab

Explore scale construction, modal relationships, and the five C–A–G–F–D positions in standard re-entrant G–C–E–A tuning.

Ukulele Labs

Explore

Choose a scale or mode

Selections update the theory and ukulele fretboard instantly.

TonicScale / Mode

Full fretboardStandard re-entrant G–C–E–A · open strings through fret 15

Harmony map

Circle of fifths

C major

Scale anatomy

C major

I / M Major · i / m Minor · ° / dim Diminished · + / aug Augmented

I · MC1

ii · mD2

iii · mE3

IV · MF4

V · MG5

vi · mA6

vii° · dimB7

Degrees

IIIIIIIVVVIVII

Tonic chordCC · E · G · major triad

Relative minorA minorA · B · C · D · E · F · G

Parallel minorC minorC · D · Eb · F · G · Ab · Bb

Scale Origin

Where C Major comes from

C Major is the I mode of C Major.

Parent scaleC Major

Mode IStarts on the first degree of the major scale.

Selected scaleC Major

Parent scale notes

Parent mode IC Ionian (Major)

C is degree 1 of C Major. Starting the displayed parent notes on C produces C Ionian (Major). It uses the same notes as C Major; the note heard as the tonal center is what changes.

Mode notesC · D · E · F · G · A · BFormula1 · 2 · 3 · 4 · 5 · 6 · 7

Origin Diagram

Parent degree map

C Major

Highlighted degree: I · C

CAGFD fretboard

Five connected shape positions

Selected: C shape

Pentatonic paths

C major pentatonic

Three-notes-per-string paths

Compact 3NPS paths anchored to each CAGFD chord shape.

Auditions use the existing clean acoustic string voice, voiced in the ukulele’s register.

Scale–Chord Relationships

C-rooted chords in C major

Every displayed chord begins on C and uses only notes from the selected scale. Each row maps that chord through all five CAGFD positions.

Ukulele Scales & Modes Lab

Explore scale construction, modal relationships, and the five C–A–G–F–D positions in standard re-entrant G–C–E–A tuning.

Ukulele Labs

Explore

Choose a scale or mode

Selections update the theory and ukulele fretboard instantly.

TonicScale / Mode

Full fretboardStandard re-entrant G–C–E–A · open strings through fret 15

Harmony map

Circle of fifths

C major

Scale anatomy

C major

I / M Major · i / m Minor · ° / dim Diminished · + / aug Augmented

I · MC1

ii · mD2

iii · mE3

IV · MF4

V · MG5

vi · mA6

vii° · dimB7

Degrees

IIIIIIIVVVIVII

Tonic chordCC · E · G · major triad

Relative minorA minorA · B · C · D · E · F · G

Parallel minorC minorC · D · Eb · F · G · Ab · Bb

Scale Origin

Where C Major comes from

C Major is the I mode of C Major.

Parent scaleC Major

Mode IStarts on the first degree of the major scale.

Selected scaleC Major

Parent scale notes

Parent mode IC Ionian (Major)

C is degree 1 of C Major. Starting the displayed parent notes on C produces C Ionian (Major). It uses the same notes as C Major; the note heard as the tonal center is what changes.

Mode notesC · D · E · F · G · A · BFormula1 · 2 · 3 · 4 · 5 · 6 · 7

Origin Diagram

Parent degree map

C Major

Highlighted degree: I · C

CAGFD fretboard

Five connected shape positions

Selected: C shape

Pentatonic paths

C major pentatonic

Three-notes-per-string paths

Compact 3NPS paths anchored to each CAGFD chord shape.

Auditions use the existing clean acoustic string voice, voiced in the ukulele’s register.

Scale–Chord Relationships

C-rooted chords in C major

Every displayed chord begins on C and uses only notes from the selected scale. Each row maps that chord through all five CAGFD positions.

Choose a scale or mode

Circle of fifths

C major

Where C Major comes from

Parent degree map

Five connected shape positions

Pentatonic paths

Three-notes-per-string paths

C-rooted chords in C major

C

Cadd9

C6add9

Cmaj7

Cmaj7add13

C6

Cmaj9

Choose a scale or mode

Circle of fifths

C major

Where C Major comes from

Parent degree map

Five connected shape positions

Pentatonic paths

Three-notes-per-string paths

C-rooted chords in C major

C

Cadd9

C6add9

Cmaj7

Cmaj7add13

C6

Cmaj9