Instrument Tuner
Listens through your microphone and shows the note and how sharp or flat it is — for guitar, ukulele, violin and more
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An online tuner that listens through your microphone and shows the nearest note and how many cents sharp or flat it is. Use it for guitar, bass, ukulele, violin, viola or cello.
How to use
- Under "Mode", choose "Chromatic (all notes)" or an instrument such as "Guitar, standard (E A D G B E)".
- Press "Turn on microphone", allow it, and pluck one string near the device.
- If the needle is left of the middle ("◀ Flat"), tighten the string; if it is right ("Sharp ▶"), loosen it. When "✓ In tune" appears, go to the next string.
- In an instrument mode the nearest string is chosen automatically. Press a string button to hear its reference tone and stay on that string.
How it works
- Pitch uses equal temperament from A4, adjustable from 415 to 466 Hz (usually 440 Hz). One cent is 1/100 of a semitone, and within ±5 cents counts as in tune.
- It detects 60 to 2,000 Hz, and down to 35 Hz in "Bass (E A D G)" mode. When the pitch is unclear, for example with several strings ringing, nothing is shown.
- Note names can be "C D E", "Do Re Mi" or "German (H)" under "Note names". Microphone sound is used only on this device and is not recorded or sent.
Questions and answers
- What are the notes of standard guitar tuning?
- From the sixth string: E2 A2 D3 G3 B3 E4. The low E2 is about 82.4 Hz and A2 is 110 Hz.
- How do I tune a ukulele?
- Choose "Ukulele (G C E A)" and tune to G4 C4 E4 A4, starting from the string nearest your face. G4 is higher than C4, so the G string sounds higher than the C string.
- Why does the needle jump or show nothing?
- Pluck one string at a time, mute the others, play close to the microphone and reduce background noise.
- Can I tune to a pitch other than A4 = 440 Hz?
- Yes. Set "Reference pitch A4" between 415 and 466 Hz. All target frequencies are recalculated from it.