C Major (Ionian) Scale on Guitar — 2 Shapes to Play the Whole Neck
C Major (Ionian) is one of the seven modes of the major scale — on guitar its notes are C D E F G A B, built from the formula 1 2 3 4 5 6 7. Computed live for this exact root and scale, Fretprism finds 2 repeating shapes — the small pattern set you actually need to play it across the whole neck.
C Major (Ionian) Scale Notes
| Degree | Note | Interval |
|---|---|---|
| 1 | C | 1 |
| 2 | D | 2 |
| 3 | E | 3 |
| 4 | F | 4 |
| 5 | G | 5 |
| 6 | A | 6 |
| 7 | B | 7 |
C Major (Ionian) Formula
Degree formula: 1 2 3 4 5 6 7
Whole – Whole – Half – Whole – Whole – Whole – Half
C Major (Ionian) on the Guitar Fretboard
The notes of Major (Ionian) repeat across the guitar fretboard in connected positions. Use the shape below to identify root notes, scale degrees, and neighboring shapes.
- Frets 0–7 (span 7 frets)
- Lowest note A, highest note G
- 2 C root notes, on the A string (fret 3), B string (fret 1)
How to practice this shape
- Start on the root — C at fret 3 on the A string. Play up to the highest note in the shape, then back down, staying inside frets 0–7.
- Your hand shifts 4 times as you cross strings: E→A (-2), A→D (-1), G→B (-1), B→E (-1). Those crossings — not the notes — are what this position is really asking you to learn.
- Once it feels automatic, move on to the next of the 2 shapes — together they cover the whole neck, and the same pattern repeats from there.
What Gives C Major (Ionian) Its Sound?
The characteristic sound of C Major (Ionian) comes from its major 3rd and major 7th.
Diatonic chords
These are the 7 chords built from C Major (Ionian)'s own notes — the ones that will sound like they belong when you're writing a progression, backing a melody, or jamming in this key. The Roman numeral shows each chord's role in the key: capital for major, lowercase for minor, ° for diminished, + for augmented. Not every scale produces a clean chord on every degree — where that happens, we show it honestly instead of forcing a name that doesn't fit.
C Major (Ionian) Scale Relationships
- Relative minor: A Natural Minor (Aeolian)
- Parallel minor: C Natural Minor (Aeolian)
C Major (Ionian) vs C Natural Minor (Aeolian)
C Major (Ionian) and C Natural Minor (Aeolian) differ on 3 degrees: the 3rd (3 vs b3), the 6th (6 vs b6), the 7th (7 vs b7).
C Major Pentatonic Scale
The c major pentatonic scale contains C – D – E – G – A. Compared with C Major (Ionian), the 4th and 7th degrees are removed.
Modes of the C Major (Ionian)
- 1. C Major (Ionian)
- 2. D Dorian
- 3. E Phrygian
- 4. F Lydian
- 5. G Mixolydian
- 6. A Natural Minor (Aeolian)
- 7. B Locrian
C Major (Ionian) FAQ
C Major (Ionian) contains the notes C, D, E, F, G, A, B.
The relative minor of C Major (Ionian) is A Natural Minor (Aeolian) - same notes, same key signature, different root.
The diatonic chords in C Major (Ionian) are C, Dm, Em, F, G, Am, Bdim.
C Major (Ionian)'s formula is 1 2 3 4 5 6 7 - a major scale, unaltered from the natural major pattern.