Free online tool
Ukulele Tuner: Free Online Tuner for GCEA, Low G and Baritone
Free online ukulele tuner using your microphone: standard GCEA (high G), low G and baritone DGBE. Hear a reference tone for each string. Nothing is recorded.
Press the button and your browser will ask to use the microphone. The tuner needs it to hear your ukulele. Sound is analysed on your device and is never recorded or sent anywhere.
Strings
Tap a string to tune to it (this turns automatic detection off), or the ▶ button to hear the reference pitch.
Ukulele tunings and string frequencies
Strings in the order they are listed, A4 = 440 Hz, equal temperament. Each tuning is a row.
| Tuning | String 1 | String 2 | String 3 | String 4 |
|---|---|---|---|---|
| Standard GCEA (high G) | G4392.00 Hz | C4261.63 Hz | E4329.63 Hz | A4440.00 Hz |
| Low G (linear) | G3196.00 Hz | C4261.63 Hz | E4329.63 Hz | A4440.00 Hz |
| Baritone DGBE | D3146.83 Hz | G3196.00 Hz | B3246.94 Hz | E4329.63 Hz |
About the Ukulele Tuner
Ukulele Tuner is a free online ukulele tuner that listens through your microphone and shows whether each string is sharp, flat or in tune. It runs in your web browser with no sign-up. The tool covers three tunings: standard GCEA (high G), low G, and baritone DGBE. For each string, it plays a reference tone you can match by ear. Nothing you play is recorded.
Use it for a quick check before a practice session, after you fit new strings, or when you move between a soprano, concert or tenor ukulele and a baritone. It is also a simple way to check a baritone uke tuning without needing a separate instrument.
How to use the Ukulele Tuner
- Press Start microphone and allow access when the browser asks.
- Pick your tuning in the Tuning menu: Standard GCEA (high G), Low G (linear), or Baritone DGBE.
- If you need a different reference pitch, set it in A4 reference (Hz). The standard value is 440 Hz.
- Pluck one open string and let it ring. The Strings are listed in the order G, C, E, A, so start with the first one.
- Watch the meter. Turn the peg until the needle is in the green band and the display says In tune.
- If you want a target to match, press the ▶ beside a string to hear its reference tone. Match the pitch by ear, then check the meter.
- Repeat for every string, then pluck all four again to check the chord sounds right.
If the tuner picks the wrong string, untick Detect the string automatically and tap the string you are tuning. Hold the microphone or phone close to the sound hole, and keep the room quiet. A ukulele is quieter than a guitar, so background noise can throw off the reading.
Use this tuner in a quiet room, and hold your phone or microphone close to the ukulele’s sound hole. The strings are light, so the tone is soft and background noise can throw off the reading.
Press ▶ Play beside a string to hear its reference pitch, then match it by ear and check the meter.
What are the standard ukulele notes?#
The standard soprano, concert and tenor ukulele is tuned G4, C4, E4, A4, written G C E A. With A4 set to 440 Hz, those strings sound at 392.00, 261.63, 329.63 and 440.00 Hz.
These are the targets the tuner uses for the default Standard GCEA (high G) setting. Each note is a fixed pitch, so a string that matches the target sounds the same as the reference tone.
What does re-entrant tuning mean?#
Re-entrant tuning means the G string is tuned higher than the C string next to it. Because of this, the pitch does not rise steadily from the first string to the last.
This arrangement gives the ukulele its bright, characteristic sound. It also means the G string is the one to check most carefully, since it sits above its neighbour even though it is the first string on the instrument.
What is low G tuning?#
Low G (linear) tuning drops the G string an octave to G3, so the strings rise in pitch from G3 to A4. It is common on concert and tenor ukuleles.
The result is a fuller low end and a more guitar-like run of notes from string to string. The tool labels this setting Low G (linear) because the pitches climb in a straight line.
How is a baritone ukulele tuned?#
A baritone ukulele is usually tuned D3, G3, B3, E4. This matches the four highest strings of a guitar, so a guitar player can often use the same chord shapes and fingering.
The tool’s Baritone DGBE setting uses these four notes. Because the strings are lower, check each one slowly, since the meter needs a clear, steady pluck to settle.
Why does my ukulele go out of tune so quickly?#
New nylon or fluorocarbon strings stretch for days after they are fitted, so they keep drifting flat or sharp. Changes in temperature and humidity also change string tension.
Retune after you fit new strings, and recheck all four strings before you play. If you tune a cold instrument, check it again once it has warmed up.