Ukulele Tuner
Tune your ukulele online with the microphone, by ear with reference tones or from a recording: standard GCEA, low G, baritone DGBE and D tuning.
Tune a soprano, concert or tenor ukulele in standard G C E A (with a high or a low G), a baritone in D G B E, or the bright D tuning. Use the live microphone tuner, tune by ear with exact reference tones, or check a recording. The reference pitch can be changed from A4 = 440 Hz. Sound is analysed in your browser and never recorded or uploaded.
How to use this tool
- Choose the mode and the tuning.
- Live: press Calculate, allow the microphone and pluck one string at a time until the bar is centred and green.
- By ear: press Calculate and match each string to its reference tone.
- Recording: choose "Check a recording", pick a recording of one string and press Calculate.
Formula
f = A4 × 2^((n − 69) ÷ 12) · cents = 1200 × log2(f_played ÷ f_target)
Standard tuning in order from the string nearest your chin: G4 (392.00 Hz), C4 (261.63 Hz), E4 (329.63 Hz), A4 (440.00 Hz). Low G drops the first string an octave to G3 (196.00 Hz). Pitch is measured with the YIN method; within ±5 cents counts as in tune.
Example
The C string should be 440 × 2^((60 − 69) ÷ 12) = 261.63 Hz. If the tuner hears 258 Hz, that is 1200 × log2(258 ÷ 261.63) = −24 cents: flat, so tighten the peg slightly.
Frequently asked questions
High G or low G?
Most ukuleles use a high (re-entrant) G string, which gives the classic bright sound. Low G uses a thicker string an octave lower for a fuller range; choose the tuning that matches your string.
Why does my ukulele go out of tune so quickly?
New nylon or fluorocarbon strings stretch for several days. Retune often during the first week; it settles once the strings have stretched.
Can I tune a guitar with this?
Use the guitar tuner instead: it has the six guitar strings and tunings. A baritone ukulele uses the same notes as a guitar's top four strings (D G B E).
Last updated:
Page address with these inputs: https://kakao.mobile/tools/ukulele-tuner/
Cite or embed this tool
kakaoCalc. (2026, November 8). Ukulele Tuner. https://kakao.mobile/tools/ukulele-tuner/
“Ukulele Tuner.” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/ukulele-tuner/.