Guitar Tuner
Tune a 6-string guitar to standard tuning EADGBE with a free mic tuner that shows note, Hz and cents for every string.
Microphone tuner
Play a string, see exactly how far off it is
- Your browser asks once for the microphone. Choose Allow.
- Audio is analysed on this device. Nothing is recorded or uploaded.
- The screen stays awake while the tuner runs.
Space start or stop 1 to 6 pick a string and hear it Esc stop the tone
| String | Note | Frequency (Hz) |
|---|---|---|
| 6th string (Low E) | E2 | 82.41 |
| 5th string (A) | A2 | 110.00 |
| 4th string (D) | D3 | 146.83 |
| 3rd string (G) | G3 | 196.00 |
| 2nd string (B) | B3 | 246.94 |
| 1st string (High E) | E4 | 329.63 |
Values use equal temperament with A4 fixed at 440 Hz. Every frequency links to its own reference page. The tuner above rescales them when you calibrate A4.
Standard guitar tuning is E2, A2, D3, G3, B3 and E4 from the thick low string to the thin high string. This page shows the exact target note and frequency for each of the six strings, then hands off to TuneStand's chromatic tuner so you can match each one by ear through your microphone.
How to tune a guitar to standard tuning
Standard tuning stacks the six strings in fourths, except for a major third between the G and B strings. Starting from the thickest string that is E2 (82.41 Hz), A2 (110 Hz), D3 (146.83 Hz), G3 (196 Hz), B3 (246.94 Hz), then the thinnest string back at E4 (329.63 Hz), two octaves above the low E. Pluck one string at a time, let it ring clearly, and watch the tuner needle: a positive cents reading means the string is sharp and needs loosening, a negative reading means it is flat and needs tightening.
If a string is wildly out of tune the pitch detector may lock onto a harmonic instead of the fundamental. Play the open string firmly, mute the other strings with your fretting hand, and get within a semitone or two using a rough reference before fine tuning with cents. New strings stretch and go flat quickly, so retune a couple of times after changing a set.
Frequently asked questions
What are the standard guitar tuning notes?
Standard 6-string guitar tuning, low to high, is E2, A2, D3, G3, B3, E4. In letter names that is E-A-D-G-B-E, the tuning almost every beginner method and songbook assumes by default.
What is the frequency of each guitar string in standard tuning?
Low E2 is 82.41 Hz, A2 is 110 Hz, D3 is 146.83 Hz, G3 is 196 Hz, B3 is 246.94 Hz, and high E4 is 329.63 Hz, all using equal temperament with A4 at 440 Hz.
How is this different from a regular chromatic tuner?
It is the same microphone-based pitch detector as the main TuneStand tuner, with the correct standard-tuning target notes for guitar shown alongside it so you know exactly what each string should read.
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Frequencies on this page are computed at build time from twelve tone equal temperament with A4 = 440 Hz, using the twelfth root of two (about 1.059463) per semitone. Nothing is typed in by hand. See the full method and sources. Maintained by FusionStudios. Last reviewed: .