Ukulele tuner
G, C, E, A — in tune in a minute.
–
–cents
Strings
Tap a string to hear its note and tune to it; tap again to go back to automatic
Nothing leaves your device
This tool runs entirely in your browser. What you type, play or record here stays on your device: nothing is uploaded or saved on a server.
Example
Example: tuning G C E A, and what the tuner says for each string
A soprano ukulele with new strings, reference 440 Hz. In tune, the strings are G4 392.0 Hz, C4 261.6 Hz, E4 329.6 Hz and A4 440.0 Hz. Plucked one at a time, each is read against the nearest of those four notes.
- In tune means within 3 cents for 0.6 seconds: the note turns green and stays green through a wobble of up to 5 cents.
- Tap a string’s button to hear its note for 2 seconds and keep the tuner on that string; tap it again to go back to automatic.
- With 442 Hz chosen, every string moves up a little: A4 442.0 Hz, G4 393.8 Hz, C4 262.8 Hz, E4 331.1 Hz.
| String plucked | Frequency heard | Tuner shows | Message |
|---|---|---|---|
| G | 392.0 Hz | G 4, 0 cents | In tune |
| C | 255.0 Hz | C 4, −44 cents | Too low — tighten |
| E | 333.0 Hz | E 4, +18 cents | Too high — loosen |
| A | 446.0 Hz | A 4, +23 cents | Too high — loosen |
Tighten the C until −44 comes up to 0, loosen the E and the A until they come down, and all four strings show green. New nylon strings stretch, so expect to do it daily for the first week or two.
How it works
- Press Start tuner and allow the microphone.
- Play each string: the tuner shows which one it hears and whether it is flat or sharp.
- Turn the peg until the needle is centred; tap a string to hear its note.
Frequently asked questions
- What are the ukulele string notes?
- G4 C4 E4 A4 — “My Dog Has Fleas”. The G string is higher than the C (re-entrant tuning) on soprano, concert and most tenor ukuleles.
- Does it work for a low-G ukulele?
- Use the chromatic tuner for the low string. This page reads every note against the nearest of G4, C4, E4 and A4, so a low G3 (196.0 Hz) is taken for a very flat C4: the needle sits hard left, with “196.0 Hz · G3” in small type under it. The chromatic tuner names the note it hears, G3, and shows how far off it is.
- What do the cents mean?
- A cent is a hundredth of a semitone. The needle runs from −50 on the left to +50 on the right and stays at the end beyond that; within ±3 cents for 0.6 seconds the string counts as in tune.
- Why does the tuner not hear anything?
- The browser needs permission to use the microphone — press Start and allow it, or check the icon next to the address bar. Play one string at a time, close to the phone or laptop, in a quiet room.
- Why does my ukulele go out of tune so fast?
- New nylon strings stretch for a week or two. Tune often at first; they settle.
- Is my playing recorded?
- No. The sound is analysed in your browser as it comes in and is never recorded or uploaded.
Made for a specific use
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