Open A Ukulele Tuner
Tuner
Ukulele Open A (A C# E A) • 4 strings • 440 Hz
Detected
Target
220.0 Hz
Select String
Ready to tune?
Click "Start Listening" and select a string to tune. Auto-detect is assist-only and works best when the string is already close to pitch.
Tune the fourth through first strings to A3 C#4 E4 A4. The pitches form an A major chord across a complete octave. A3 is lower than standard G4, so the fourth string needs to be built for that lower register.
Note Layout
Notation
A3 C#4 E4 A4
How to Tune
Click "Start Listening"
Allow microphone access when prompted.
Play Each String
Auto-detect will find the string, or click to select manually.
Adjust Until Green
Center the needle and watch for the green "In Tune" indicator.
Tune Open A cleanly
Confirm the fourth string is suitable for A3
Raise C4 to C#4 with a small peg movement
Leave E4 and A4 at their standard targets
Check the low and high A together after tuning
About Open A ukulele tuning
History & context
Open A uses a linear root-third-fifth-octave layout. It suits A-major drones and melodies that need the open fourth string as a bass anchor.