Ukulele Tuner
Tune a soprano, concert or tenor ukulele to standard reentrant tuning GCEA with a free mic tuner showing note, Hz and cents.
Microphone tuner
Play a string, see exactly how far off it is
- Your browser asks once for the microphone. Choose Allow.
- Audio is analysed on this device. Nothing is recorded or uploaded.
- The screen stays awake while the tuner runs.
Space start or stop 1 to 4 pick a string and hear it Esc stop the tone
| String | Note | Frequency (Hz) |
|---|---|---|
| 4th string (G, high) | G4 | 392.00 |
| 3rd string (C) | C4 | 261.63 |
| 2nd string (E) | E4 | 329.63 |
| 1st string (A) | A4 | 440.00 |
Values use equal temperament with A4 fixed at 440 Hz. Every frequency links to its own reference page. The tuner above rescales them when you calibrate A4.
Standard ukulele tuning for soprano, concert and tenor sizes is G4, C4, E4 and A4, remembered by generations of players as "My Dog Has Fleas". It is a reentrant tuning, meaning the fourth string is not the lowest pitch, which trips up anyone expecting strings to run low to high like a guitar.
Why ukulele tuning is reentrant
In standard reentrant tuning the fourth string is tuned to G4 at 392 Hz, which is higher than the third string C4 at 261.63 Hz. So the string order by pitch is actually C, E, G, A rather than climbing straight from the fourth string to the first. The second and first strings continue upward as expected: E4 at 329.63 Hz and A4 at 440 Hz.
This layout gives the ukulele its bright, chiming sound and is what almost every songbook, chord chart and beginner tutorial assumes. Some players restring with a low G fourth string, a full octave below standard, for a wider range closer to a guitar; that is a deliberate alternate tuning, not the standard covered here.
Frequently asked questions
What is standard ukulele tuning?
G4, C4, E4, A4, spoken as "My Dog Has Fleas". It applies to soprano, concert and tenor ukuleles and is reentrant, meaning the G string is tuned higher than the C string next to it.
Why is the G string higher than the C string?
Standard ukulele tuning is reentrant by design: the fourth string (G4, 392 Hz) sits above the third string (C4, 261.63 Hz) in pitch, unlike a guitar where each string is lower than the one before it.
Is baritone ukulele tuned the same way?
No. Baritone ukulele uses DGBE, the same notes as the top four strings of a guitar, and is not reentrant. See the separate baritone ukulele tuner for that tuning.
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Frequencies on this page are computed at build time from twelve tone equal temperament with A4 = 440 Hz, using the twelfth root of two (about 1.059463) per semitone. Nothing is typed in by hand. See the full method and sources. Maintained by FusionStudios. Last reviewed: .