Free Guitar Tuner Online
Tune your guitar quickly and accurately with our free online guitar tuner. Real-time pitch detection works with acoustic and electric guitars.
Guitar String Reference
Standard (EADGBE) tuning frequencies:
| String | Note | Octave | Frequency |
|---|---|---|---|
| 6 | E | 2 | 82.41 Hz |
| 5 | A | 2 | 110.00 Hz |
| 4 | D | 3 | 146.83 Hz |
| 3 | G | 3 | 196.00 Hz |
| 2 | B | 3 | 246.94 Hz |
| 1 | E | 4 | 329.63 Hz |
How to Tune Your Guitar
Standard guitar tuning from low to high is E A D G B E. The thickest string (6th) is tuned to E2 (82.41 Hz), and the thinnest string (1st) is tuned to E4 (329.63 Hz).
- 1Click 'Start Tuning' and allow microphone access when prompted
- 2Pluck the 6th string (thickest, closest to you) - it should be E
- 3Watch the meter - tune up if flat (pink), tune down if sharp (cyan)
- 4When the meter shows green and the note is centered, that string is in tune
- 5Repeat for strings 5 (A), 4 (D), 3 (G), 2 (B), and 1 (E)
- 6Re-check each string after tuning all six, as adjustments can affect other strings
Frequently Asked Questions
Standard guitar tuning from lowest to highest string is E A D G B E. The low E string vibrates at 82.41 Hz, and the high E string at 329.63 Hz. This tuning has been standard since the early 1800s.
Tune your guitar every time you play. Temperature, humidity, and string tension cause guitars to go out of tune. New strings need more frequent tuning until they stretch and settle, usually 1-2 weeks.
Common causes include: new strings that haven't stretched yet, temperature/humidity changes, worn tuning pegs, a poorly cut nut, or loose hardware. If the problem persists, have a guitar tech check your setup.
Drop D tuning lowers the 6th string from E to D, making power chords easier to play with one finger. It's popular in rock, metal, and alternative music. Select 'Drop D' from the tuning menu to use this tuning.