Chord charts and tab notation look like code until someone explains the system - then they are completely obvious. Once you can read them, every chord and riff on the internet becomes available to you without needing anyone to show you in person.
This lesson covers both: chord diagrams (which show where to press on the fretboard) and tab (which shows notes in sequence). They are different tools and you will use both regularly.
Reading a Chord Diagram
A chord diagram is a grid. Picture the ukulele held vertically in front of you, neck pointing up. The grid maps that view:
Four vertical lines = the four strings, left to right: G, C, E, A
Horizontal lines = the frets
The thick line at the top = the nut (the zero-fret marker)
On the diagram, you will find:
Filled circles (dots) - where to press your finger. The number inside tells you which finger: 1 = index, 2 = middle, 3 = ring, 4 = pinky.
"O" above a string - play that string open (unfretted).
"X" above a string - do not play that string. Rare on ukulele, more common on guitar.
A number to the left of the grid - the fret position when the chord is not played at the first fret. If no number appears, assume fret 1.
Here is the Am chord as an example:
Am
Am has one dot on the G string at fret 2, pressed by finger 2 (middle finger). The C, E, and A strings have an O - all three are played open. That is it.
Compare this to the diagram and the description. Once you trust that the diagram and the description say the same thing, you can read any chord diagram independently.
Reading Tab
Tab (short for tablature) is a different notation. Instead of showing where to press, it shows what note to play by fret number.
A ukulele tab has four horizontal lines, one per string. The lines are stacked like this:
A |---|
E |---|
C |---|
G |---|
Numbers on the lines tell you which fret to press on that string. Zero means open string.
Example - a simple descending line on the A string:
A |--3--2--0--|
E |----------|
C |----------|
G |----------|
Read left to right: press fret 3 on the A string, then fret 2, then play it open. One note at a time.
When numbers appear in a vertical stack, play those strings simultaneously - that is a chord written in tab form.
Where Chord Diagrams and Tab Differ
Chord diagrams show a static hand position - all the strings at once. Tab shows a sequence of notes over time. Most songs use both: diagrams for the chord shapes, tab for the specific riffs or melodies between chords.
You will encounter chord-only songs (just strum changes), tab-only songs (riff-based), and songs that mix both. All three formats use the same two systems you just learned.
Practice Exercise
Look at the Am diagram above. Without looking at any description, place your finger based on the diagram alone. Then check: is finger 2 on the G string, fret 2?
Practice reading the tab line above on your ukulele. Go slowly - fret 3 on A, then fret 2, then open. Repeat until you can do it without stopping to think.
Find a chord you do not know yet - look it up online and read the diagram without help. Identify the string, fret, and finger number for each dot.
Common Questions
How do you read a ukulele chord diagram?
A ukulele chord diagram is a grid with four vertical lines (the strings G, C, E, A from left to right) and horizontal lines (the frets). Filled circles show where to press your finger, with numbers indicating which finger to use: 1 for index, 2 for middle, 3 for ring, 4 for pinky. The letter "O" above a string means play it open; "X" means mute it.
What does the number on a ukulele tab line mean?
Each number in tab notation represents a fret position on a specific string. A 0 means play the open string without pressing any fret. The number 3 on the A line means press fret 3 on the A string. Read the numbers left to right to follow the sequence of notes.
