Standard tuning is E–A–D–G–B–E, from the thickest string to the thinnest
Most guitars come tuned to standard tuning, which means the six strings, from thickest to thinnest, are tuned to the notes E, A, D, G, B, and E. This is the tuning you hear on nearly every song recorded in the last century—it is the default because it balances playability, range, and the way chord shapes work across the fretboard.
When you hold a guitar in playing position, the thickest string closest to your face is the low E string (the 6th string). The thinnest string farthest from you is the high E string (the 1st string). The two E strings are the same note, just two octaves apart—that is, the high E is much higher in pitch.
If your guitar is not in standard tuning, chords will sound wrong, songs you learn from tabs or videos will not match, and the instrument will feel harder to play. That is why the first step in learning guitar is learning to tune it correctly.
Key Takeaways
- Standard tuning from lowest to highest string is E–A–D–G–B–E, and this is what nearly all guitar instruction assumes.
- The two E strings are the same note at different octaves, which is why the pattern repeats.
- A tuner—either a clip-on device, a pedal, or a phone app—is the fastest and most reliable way to check and adjust your tuning.
- Some songs and styles use alternate tunings, but standard tuning is where you should start and return to when learning new material.
Why guitars use this particular set of notes
Standard tuning was not invented by decree—it evolved because it works. The intervals between the strings (the distance in pitch from one string to the next) create chord shapes that fit naturally under your fingers. An open E major chord, for example, uses all six strings with no fingers pressed down, and it sounds full and resonant.
The tuning also gives you a wide range. The low E string produces a deep, bass-like tone, while the high E string reaches into the treble. This range lets you play melody, harmony, and bass all on one instrument. If the strings were tuned differently—say, all to the same note—you would lose that range and the chord shapes would not work the same way.
Historically, different tunings were common before the 20th century, but standard tuning became the norm because it worked well for the music being written and recorded. Once millions of songs, instruction books, and videos were made using standard tuning, it became self-reinforcing: everyone learned it because everyone else used it.
How to check if your guitar is in standard tuning
The simplest method is to use a tuner. A clip-on tuner fastens to the headstock of your guitar and reads the vibration of each string. You pluck a string, and the tuner displays the note and whether it is sharp (too high) or flat (too low). Clip-on tuners cost between $10 and $30 and work without batteries for weeks or months.
Smartphone tuner apps are also free or very cheap and work well in a quiet room. Search your phone's app store for "guitar tuner" and choose one with good reviews. Hold the phone near the strings and pluck each one. The app will show you the note and whether you need to tighten or loosen the tuning peg.
If you do not have a tuner, you can tune by ear using a reference note—a piano, another instrument, or a video of someone playing the low E string. Pluck your low E string and adjust the tuning peg until it matches the reference. Then tune the other strings relative to the first one using the interval method (a technique that takes practice). This method is slower and less accurate, but it works if you have no other option.
Tightening and loosening the tuning pegs
Each string connects to a tuning peg at the headstock. Turning the peg clockwise or counterclockwise changes the tension on the string, which raises or lowers the pitch. The direction varies depending on which peg and which side of the headstock it is on—some guitars have three pegs on each side, others have all six on one side.
The safest approach is to watch a tuner or app as you turn. If the tuner says the string is flat (too low), turn the peg slowly until the note rises to the correct pitch. If it is sharp (too high), turn the other direction. Make small adjustments—a quarter turn at a time—because the pitch changes quickly and it is straightforward to overshoot.
New strings go out of tune faster than old ones because the metal is still settling. If you just put new strings on, tune them, and come back an hour later, they will likely be flat again. This is normal. Tune them again, and they will hold better the next time.
Alternate tunings and when musicians use them
Some songs and styles use tunings other than standard. Drop D tuning lowers the low E string to D, giving a heavier sound popular in rock and metal. Open G tuning tunes the strings so that an open chord (no fingers pressed) plays a G major chord, which is common in blues and folk. Half-step down lowers all six strings by one semitone, which some singers prefer because it sits better in their vocal range.
If you are learning from a song tab or video and the tuning is not standard, the tab or description will say so. Do not assume alternate tuning unless you are told. Most beginner songs and instruction use standard tuning, so you should return to it between learning different pieces.
Switching tunings takes a few minutes—you adjust the pegs and check with a tuner—but it is worth learning how because many songs you will want to play use at least one alternate tuning. Some advanced players keep multiple guitars tuned to different tunings so they do not have to retune between songs.
What happens if your guitar drifts out of tune
Guitars go out of tune for several reasons: temperature and humidity changes, the natural stretching of new strings, playing hard or bending strings, or straightforward time passing. A guitar that was in tune this morning might be slightly flat by evening, especially if the room got warmer or colder.
This is not a sign that something is broken. It is normal. Professional musicians tune before every performance and often between songs. Beginners should tune before each practice session and whenever a song does not sound right.
If your guitar goes out of tune very quickly—within minutes of tuning—the tuning pegs might be loose, the bridge might be damaged, or the strings might be old and worn. These are things a guitar repair person can diagnose. But gradual drift over hours or days is just how guitars work.
Frequently Asked Questions
Can I tune my guitar to a different key if I want to?
Yes, you can lower or raise all the strings together by loosening or tightening the tuning pegs. This is called transposing. However, lowering the strings too much can make them slack and hard to play, and raising them too much puts stress on the neck. Standard tuning is designed for the guitar's structure, so stay close to it.
Do electric and acoustic guitars use the same tuning?
Yes, both use standard E–A–D–G–B–E tuning by default. The main difference is that acoustic strings are thicker and create more tension, so they may feel harder to press down. The notes are the same.
What if I tune my guitar and it sounds wrong?
First, check that the tuner is reading the right string—it is straightforward to pluck the wrong one. If the tuner says the string is in tune but it sounds bad, the string might be damaged or the fret might be bent. Try a different string to make sure the tuner itself is working. If multiple strings sound off, the tuner might need new batteries.
How often should I tune my guitar?
Tune before each practice session and whenever a song does not sound right. If you play daily, you might need to tune once or twice a week. If you play occasionally, tune before you pick it up. New strings need tuning more often for the first week.