A ukulele in its most common tuning uses the notes G C E A.
On this page you can choose a scale and key to view its notes directly on the instrument’s fretboard. The diagram can also show scale degrees, making it easier to study intervals and transpose to other keys.
Reentrant tuning
On many ukuleles, the G string uses what is called reentrant tuning.
This means G is not the instrument’s lowest string. In high-G tuning, the sequence of pitches does not rise continuously from one string to the next as it does on linearly tuned instruments.
This characteristic strongly affects how melodies, scales, and chords sound on the ukulele.
It does not change which notes belong to a scale, however. A G remains a G regardless of the octave in which it appears.
That is why the diagram can show scale notes correctly even when the pitch order between strings is not linear.
High G and low G
Not every ukulele uses a high fourth string.
Some instruments are tuned with low G, where the G string is one octave below the reentrant version.
The note names on the fretboard remain the same:
G – C – E – A
What changes is the octave of the fourth string and, consequently, the melodic direction of some phrases.
The same map remains valid for studying note relationships, scales, and degrees. To study register and melodic movement, it is important to know whether the instrument uses high G or low G.
How to study scales on the fretboard
Start by choosing a key and locating every occurrence of the root.
Then observe the other degrees around it.
Instead of memorizing the entire fretboard at once, choose a small region and identify:
- where the roots are;
- which notes belong to the scale;
- where the third and fifth appear;
- how the scale continues on neighboring strings;
- which notes appear again in other octaves.
Then connect that region to the positions immediately above and below it on the fretboard.
Note names and degrees
The diagram can be read through note names or scale degrees.
In C major, for example:
C – D – E – F – G – A – B
corresponds to:
1 – 2 – 3 – 4 – 5 – 6 – 7
Note names show which notes you are playing. Degrees show the function of those notes within the key.
This second way of reading is especially useful for transposition. A phrase built from degrees 1 – 3 – 5 – 6, for example, keeps the same relationship in any key.
Relationship to guitar
Anyone who already plays guitar will find a familiar layout on the ukulele.
The four strings G C E A have the same sequence of intervals as the guitar’s four highest strings, D G B E, simply transposed to another pitch.
That is why many chord and interval shapes can be recognized on both instruments.
A practical way to visualize this relationship is to imagine the guitar’s four highest strings with a capo at the fifth fret.
This comparison helps transfer knowledge between the instruments, but the ukulele’s reentrant tuning changes the fourth string’s register and must be considered when playing melodies.
Important scales to start with
Some scales are especially useful when you begin learning the fretboard:
- major scale;
- natural minor scale;
- major pentatonic;
- minor pentatonic;
- blues scale;
- harmonic minor.
The pentatonic is a good starting choice because it has few notes and makes intervals easier to see in different fretboard regions.
Then compare its shape with a seven-note scale and observe which degrees were added.
Scales and chords
A scale can also be used to locate the notes of a chord.
In a major scale, degrees 1, 3, and 5 form the key’s major triad.
In C major:
C – E – G
corresponds to:
1 – 3 – 5
Recognizing these notes within the scale helps relate melodies to chords and understand why certain notes sound more stable over a harmony.
The effect of reentrant tuning on melodies
With high G, playing the strings simply in order does not necessarily produce a rising sequence of pitches.
When practicing scales, it is therefore worth paying attention not only to the fretboard shape but also to the actual direction of the melody.
Try playing the same sequence of notes along different paths. In some cases, changing strings keeps the shape simple but moves the note to another octave.
This is one of the characteristics that gives the ukulele its distinctive sound.
Number of frets and markers
Ukuleles can have different scale lengths and numbers of frets depending on their size and model.
Soprano, concert, and tenor ukuleles, for example, do not necessarily end at the same fret.
Fret markers also vary between manufacturers. Frets such as 5, 7, 10, and 12 are common, but they are not an absolute rule.
If the diagram shows more frets than your instrument has, simply consider only the available region on your ukulele.
Use the diagram as a map
There is not just one correct position for playing a scale.
Choose a root, find different ways to reach the octave, and observe how the same degrees appear in different fretboard regions.
Then change the key and see which relationships remain the same.
The goal is to stop relying on one memorized shape and start recognizing notes, intervals, and functions anywhere on the instrument.