Press Start, allow the microphone, then pluck one ukulele string at a time.
The microphone is read only in your browser. No audio is recorded, saved or uploaded.
Pluck one string with your thumb and let it ring. Hold the ukulele close to the microphone.
About the Ukulele Tuner
This free ukulele tuner listens through your microphone. Pluck a string, and it shows which note you played and how far off it is. When the needle stands in the middle and the tuner says *In tune*, the string is right.
The page opens on the standard ukulele tuning, G C E A. The low G tuning and the baritone ukulele (D G B E) are in the same list. The tuner also shows the octave of the note, so you can see if your G string is a high G (G4) or a low G (G3).
It works on a phone, a tablet or a computer. Nothing is recorded: the sound is measured in your browser and thrown away at once.
Features
- Opens on the ukulele — standard G C E A is picked, with low G and baritone one tap away
- Real pitch detection — the microphone hears your string; there are no play-along tones to match by ear
- Note, octave and cents — see G4 or G3 and exactly how many cents you are off
- Needle and string list — the needle shows flat or sharp, and the string you are closest to lights up
- Reference pitch — move A4 from 415 to 466 Hz to match a piano or another player
- Remembers your choice — your tuning and reference pitch are saved in this browser
- Private — nothing is recorded, saved or uploaded
Standard ukulele tuning: G C E A
Hold the ukulele as you play it. The string closest to your face is G, then C, E and A (closest to the floor). Players number the strings the other way round: string 1 is A, string 4 is G.
| String | Note | Frequency (A4 = 440 Hz) |
|---|---|---|
| 4 (top) | G4 | 392.00 Hz |
| 3 | C4 | 261.63 Hz |
| 2 | E4 | 329.63 Hz |
| 1 (bottom) | A4 | 440.00 Hz |
In standard tuning the G string is higher than the C string next to it. This is called re-entrant tuning, and it gives the ukulele its bright, happy sound. An easy way to remember the notes is the old line "My Dog Has Fleas" — sing it on the four open strings.
Soprano, concert and tenor ukuleles all use this tuning. Only the size of the instrument changes.
Low G and baritone ukulele
Low G uses the same notes, but the G string is one octave lower: G3 (196.00 Hz) instead of G4. It gives a fuller, deeper sound and is popular on tenor ukuleles. You need a special, thicker low G string for it. Pick Ukulele — low G in the list. The tuner shows G3 when it hears the low string.
The baritone ukulele is the biggest one. It is tuned like the four highest strings of a guitar:
| String | Note | Frequency (A4 = 440 Hz) |
|---|---|---|
| 4 (top) | D3 | 146.83 Hz |
| 3 | G3 | 196.00 Hz |
| 2 | B3 | 246.94 Hz |
| 1 (bottom) | E4 | 329.63 Hz |
Tune by ear or with the microphone
With the microphone (this page) you see the answer, so you can tune in a noisy room, without a good ear and without another instrument.
By ear, you need one string that is already right. Tune the A string with this tuner or a piano, then compare the other strings with it:
- Press the E string at the 5th fret — it should sound like the open A string
- Press the C string at the 4th fret — it should sound like the open E string
- Press the G string at the 2nd fret — it should sound like the open A string (on a low G ukulele it is the same note, one octave lower)
When two notes are close but not the same, you hear a slow wobble ("beating"). Turn the peg slowly until the wobble stops. Many players tune with a tuner first and check the chords by ear after.
Tips for a ukulele that stays in tune
- New strings stretch — nylon strings go flat again and again for the first days. Tune often, it gets better
- Tune up to the note — if a string is too high, go below the note, then come up to it. The string holds better
- Pluck with your thumb, gently, and read the tuner after a second, when the note is steady
- Check again — tuning one string can pull the others a little. Go over all four strings twice
- Warm and cold rooms change the tuning. Tune again when you move your ukulele to another room
Frequently asked questions
How do I tune a ukulele with this tuner?
Press Start and allow the microphone. Pluck the G string and look at the needle. Left means too low: tighten the string. Right means too high: loosen it. Stop when it says *In tune*, then do the C, E and A strings the same way.
Can I tune a low G ukulele here?
Yes. Pick Ukulele — low G in the list. The G string then shows as G3. The other three strings are the same as on a standard ukulele.
Why does my ukulele go out of tune so fast?
New nylon strings stretch a lot during the first days, so they keep going flat. Changes in warmth and air also move the tuning. After a week of playing, new strings settle down.
Does it work for soprano, concert and tenor ukuleles?
Yes. All three use the same G C E A tuning, so they use the same setting. The baritone ukulele has its own setting (D G B E).
Does it work on a phone?
Yes. Open the page in Chrome, Safari, Edge or Firefox on your phone, press Start and allow the microphone. Hold the phone near the ukulele.
Is anything recorded?
No. The sound is measured in your browser and thrown away straight away. Nothing is saved or sent anywhere.
Related tools
- Guitar Tuner — tune a guitar with the same tuner
- Chromatic Tuner — name any note you play or sing
- Bass Tuner — tune a 4, 5 or 6 string bass
- Metronome — practise strumming with a steady beat
- Tone Generator — play a reference note to tune by ear
- Chord Transposer — change the key of a song to suit your voice
How to use it
- Ukulele — standard (G C E A) is already picked; choose low G or baritone if you play one
- Press Start and allow the microphone when the browser asks
- Pluck one open string and let it ring
- Read the note and the needle — left is too low, right is too high
- Tighten the string when it is too low and loosen it when it is too high, until it says *In tune*
- Do the next string, then check all four once more
- Press Stop when you are done, to turn the microphone off
