What tuning do these chord diagrams use?

All diagrams use standard soprano/concert/tenor ukulele tuning: G4-C4-E4-A4 (from the string closest to you to the string farthest away). This is the most common ukulele tuning worldwide, also known as re-entrant tuning because the G string is higher in pitch than the C string.

What do the numbers inside the circles mean?

The numbers represent which fretting-hand finger to use: 1 = index finger, 2 = middle finger, 3 = ring finger, 4 = pinky finger. This is the standard fingering notation used in chord books and sheet music worldwide.

What does O above a string mean?

An O means play that string open (unfretted). On ukulele, many common chords use open strings, making them easier to play than guitar chords. Unlike guitar diagrams, ukulele chords rarely need muted strings (X).

How do I read the fretboard diagram?

The diagram shows the first 4 frets. Vertical lines are strings (G on the left, then C, E, A on the right). Horizontal lines are frets. The thick line at the top is the nut. Filled circles show where to press your fingers; the number inside is the recommended finger.

Why do some chords appear higher up the neck?

Some chord shapes do not have convenient open-position voicings, so they are played as moveable shapes higher up the fretboard. The fret numbers on the left indicate the actual position on the neck.

Can I use these chords on a baritone ukulele?

Baritone ukulele uses D-G-B-E tuning (like the top four strings of a guitar), so these diagrams do not apply. The chord shapes would produce different notes. These diagrams are for G-C-E-A tuning only.

Ukulele Chord Finder

Name: Ukulele Chord Finder
Availability: InStock
Author: Nham Vu

Pick a root note and chord type to instantly see the fretboard diagram and finger positions for that ukulele chord.

Select a Chord

Root Note

Chord Type

C major

Notes in this chord

Intervals

Fretboard Diagram

Standard tuning G C E A

GCEA

Fretted note (number = finger)

Open string (O)

String-by-string

Summary

Pick a root note and chord type to instantly see the fretboard diagram and finger positions for that ukulele chord.

How it works

Select a root note from the 12 chromatic pitches (C through B).
Choose a chord quality: major, minor, dominant 7th, major 7th, minor 7th, sus2, or sus4.
The fretboard diagram updates instantly showing which strings and frets to press.
Circles with numbers show which finger to use (1=index, 2=middle, 3=ring, 4=pinky).
An O above a string means play it open; strings are G-C-E-A from left to right.
Use the chord notes list below the diagram to understand the music theory behind the chord.

Use cases

Beginners learning their first open chords on ukulele.
Intermediate players expanding their chord vocabulary in all 12 keys.
Songwriters quickly checking voicings and transposing songs.
Music teachers preparing lesson materials for ukulele students.
Guitarists switching to ukulele who need a chord reference.
Session musicians referencing less common chord shapes.
Practice reference while learning a new song by ear.
Quick lookup of extended chord shapes (maj7, m7, sus) without a chord book.

Frequently Asked Questions

Last updated: 2026-07-01 · Reviewed by Nham Vu