A guitar in standard tuning uses the notes E A D G B E, from the lowest string to the highest.
On this page you can choose a scale and key to view its notes directly on the fretboard. The diagram also lets you study through scale degrees and, where applicable, relate the notes to CAGED positions.
How the guitar fretboard is organized
Most neighboring strings are separated by a perfect fourth:
- E → A
- A → D
- D → G
- B → E
The exception is between the G and B strings, which are separated by a major third.
This difference changes the geometry of shapes when they cross those two strings. It is one reason a pattern learned in one region of the fretboard cannot always be shifted vertically without adaptation.
The diagram accounts for this relationship automatically and shows the correct notes on every string and fret.
How to study a scale on the fretboard
Start by choosing a key and locating every occurrence of the root.
Then observe how the other degrees appear around it.
Instead of trying to memorize the entire fretboard at once, choose a small region and identify:
- where the roots are;
- which notes belong to the scale;
- where the third, fifth, and seventh appear;
- how the position continues on neighboring strings;
- where it connects to the next region.
Over time, these regions stop looking like separate shapes and begin to form one map of the fretboard.
Note names and scale degrees
The diagram can show both note names and scale degrees.
In A minor pentatonic, for example:
A – C – D – E – G
can be read as:
1 – ♭3 – 4 – 5 – ♭7
Both ways of reading are useful, but they answer different questions.
Note names tell you exactly which notes are being played. Degrees show each note’s function in relation to the root and make it easier to recognize the same pattern in another key.
If a phrase uses degrees 1 – ♭3 – 4 – 5 – ♭7, that structure remains the same when the scale is transposed.
The root as a reference point
The root is the best place to start understanding any shape.
It indicates the tonal center of the scale and serves as a reference for locating every other interval.
After finding it, try to recognize:
- the third, which helps define the major or minor character;
- the fifth;
- the seventh;
- the root’s octaves.
This way of reading turns a memorized shape into a musical structure that can be transposed and modified.
Scales and chords
Scales and chords are directly related.
In a major scale, for example, degrees 1, 3, and 5 form the key’s major triad.
In C major:
C – D – E – F – G – A – B
the C major triad is:
C – E – G
or:
1 – 3 – 5
Recognizing these notes inside a scale position helps you see where the chord is located and which notes have the most direct relationship to the harmony.
This is especially useful for improvisation because it lets you choose notes according to the current chord instead of treating the entire scale as a set of equivalent notes.
The CAGED system
In standard guitar tuning, the five open-chord shapes C, A, G, E, and D can be used as references for organizing different regions of the fretboard.
Together, these shapes form the CAGED system.
Each region can be related to:
- a chord shape;
- root positions;
- chord tones;
- scale notes around that chord.
CAGED is not a scale by itself. It is a map for relating chord shapes to different regions of the fretboard.
You can study the system in more detail on the CAGED page.
Positions overlap
There is no exact line separating one scale position from the next.
The positions share notes and overlap. That overlap is what lets you move a phrase horizontally across the fretboard without stopping and starting an entirely different shape.
When studying one position, also look for the notes immediately before and after it. This helps you understand how to reach the next region.
The octave and the 12th fret
At the 12th fret, every string produces the same note as its open string, one octave higher.
For example:
- open E → E at the 12th fret;
- open A → A at the 12th fret;
- open D → D at the 12th fret.
From there, the sequence of note names repeats.
This makes the 12th fret an important reference for locating notes. The shapes continue to follow the same interval relationships above it, although the physical region of the fretboard and access to the frets may change depending on the guitar.
Spelling keys correctly
When studying scales, it is not enough to locate the correct fret: it is also important to represent each note’s name correctly.
A major scale uses each musical letter once.
So in F♯ major, for example, the seventh note is E♯, not F:
F♯ – G♯ – A♯ – B – C♯ – D♯ – E♯
These two notes can occupy the same pitch in an equal-tempered instrument, but they have different functions within the key.
The tool takes this spelling into account when generating note names.
Important scales to start with
Some scales are especially useful when you begin mapping the guitar fretboard:
- minor pentatonic;
- major pentatonic;
- major scale;
- natural minor scale;
- blues scale;
- harmonic minor.
The minor pentatonic is often a good first step because it has only five notes and lets you focus on connecting positions.
Then compare its shapes with seven-note scales and observe which degrees were added.
Use the diagram as a map
The goal is not to find one correct position for each scale.
Choose a root, find different ways to reach the octave, and observe how the same degrees appear in various regions of the fretboard.
Also try changing the key while keeping the same scale. This helps you notice which relationships remain the same and which notes change.
The more you relate notes, intervals, chords, and positions, the less the fretboard depends on isolated shapes and the more it begins to work as one system.