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Guitar Tuner
Tune your acoustic or electric guitar in standard E A D G B E tuning. Start the microphone and pluck one open string at a time.
READY WHEN YOU ARE
Hz play a single note
Your next good note starts here.
Start the microphone, then play a single note.
Just you and your instrument. Audio stays on your device.
Pick your instrument
Use a preset or go chromatic.
Tap a note to tune a specific string.
Let it listen
Allow microphone access.
Play one clear note at a time.
Meet in the middle
Adjust until the marker turns green.
Flat? Tighten. Sharp? Loosen.
Guitar tuning notes
Standard six-string guitar tuning runs from the thickest, lowest string to the thinnest, highest string: E2, A2, D3, G3, B3, E4.
| Target | Note | Frequency |
|---|---|---|
| 1 | E2 | 82.41 Hz |
| 2 | A2 | 110.00 Hz |
| 3 | D3 | 146.83 Hz |
| 4 | G3 | 196.00 Hz |
| 5 | B3 | 246.94 Hz |
| 6 | E4 | 329.63 Hz |
Targets are listed in preset order. Frequencies above use A4 = 440 Hz; changing Reference A4 adjusts the live tuner targets.
How to tune your guitar
Pluck gently and let the other strings stay quiet. Select a string button to lock its target if Auto picks a neighboring note. The two E strings are two octaves apart, so check the octave as well as the note.
Can I use this guitar tuner for drop D or alternate tunings?
The guitar preset uses standard tuning. Choose Chromatic for drop D, open tunings, or other alternate tunings; it follows the nearest concert-pitch note instead of restricting you to the six standard targets.
What do flat, sharp, and cents mean?
Flat means your pitch is below the target; sharp means it is above it. A cent is one hundredth of a semitone. Move toward 0 cents using small adjustments. For strings, tighten to raise pitch and loosen to lower it.
Can I change the reference pitch?
Reference A4 defaults to 440 Hz and accepts 400–480 Hz. Match your ensemble’s reference before tuning. The selected preset keeps its note names while its target frequencies adjust.
Choose your instrument tuner
Open a dedicated tuner for your instrument, or share its link for your next practice session.