How to tune a ukulele online
- Choose soprano, concert, tenor, or baritone. For the first three sizes, select High G or Low G to match your strings.
- Press Start tuning and allow microphone access. Audio stays in this browser.
- Pluck one open string at a time and keep the others quiet. Auto identifies the closest target string.
- Turn the peg in small steps until the meter says In tune, then check all four strings again.
If access was denied, open your browser microphone setting and try again. You can always tune by ear without a microphone.
Ukulele string frequencies
This table follows the selected tuning and reference pitch. Play a reference tone to match the string by ear.
| String | Note | Frequency | |
|---|---|---|---|
| 4 | G4 | 392.00 Hz | |
| 3 | C4 | 261.63 Hz | |
| 2 | E4 | 329.63 Hz | |
| 1 | A4 | 440.00 Hz |
Current tuning: Standard · Reference pitch A4 = 440 Hz
High G, Low G, and baritone tuning
Standard High G uses G4 C4 E4 A4. Low G changes the G string to G3. Baritone ukulele uses D3 G3 B3 E4.
Ukulele tuning tips
High G is re-entrant
On standard soprano, concert, and tenor ukuleles, G4 is intentionally higher than C4. Do not lower it an octave unless a Low G string is fitted.
New nylon strings stretch
Fresh ukulele strings may need frequent retuning for the first day or two. Use several gentle passes.
Baritone uses different notes
A baritone ukulele is tuned D3 G3 B3 E4. Select Baritone before tuning instead of using the usual G C E A targets.
Private, browser-based ukulele tuning
Pitch detection runs locally with Web Audio. The site does not record, upload, or retain microphone audio. If microphone access is blocked or unavailable, tap a string on the tuner to hear its reference note and tune by ear.
Other tuners
Ukulele tuner FAQ
What is standard ukulele tuning?
Soprano, concert, and tenor ukuleles normally use High G: G4 C4 E4 A4.
What is the difference between High G and Low G?
High G uses G4 for the re-entrant ukulele sound. Low G uses G3, one octave lower, and requires a suitable Low G string.
How is a baritone ukulele tuned?
A baritone ukulele uses D3 G3 B3 E4, like the four highest strings of a guitar.
Why will a new ukulele not stay in tune?
New nylon strings stretch. Tune them in several passes and expect to check them frequently for the first 24 to 48 hours.
Can I tune a ukulele without a microphone?
Yes. Tap a string on the tuner to hear its reference pitch; no microphone access is needed.
Last updated: Oct 22, 2026