Standard tuning starts on E, the lowest note your guitar can play

Standard tuning for guitar uses the notes E, A, D, G, B, and E, starting from the thickest string and moving to the thinnest. The lowest string (the one closest to your face when you hold the guitar normally) is tuned to E. This E is the note that defines the entire tuning system—it is the anchor point that all other strings relate to.

The reason this tuning became standard has to do with how the guitar's neck is built and how the strings naturally want to sit under tension. E on the low string gives players enough room to play notes both up and down the neck without running out of frets, and it puts the guitar's range in a comfortable spot for the human voice. Most songs you hear are written with this tuning in mind.

You do not need to memorize the note names to tune a guitar—most people use a tuner device or a tuning app—but knowing that the lowest string is E helps you understand what "in tune" means. If that low string is not E, nothing else will sound right, no matter how well you tune the other five.

Key Takeaways

  • Standard tuning uses six notes in this order from thickest to thinnest string: E, A, D, G, B, E.
  • The lowest string (thickest) is tuned to the note E, which serves as the reference point for the entire tuning system.
  • You can recognize standard tuning by ear once you learn what each open string should sound like, or you can use a digital tuner to match the pitches.
  • If the low E string is out of tune, all the other strings will sound wrong even if they are technically in tune with each other.
  • Most guitar music, tabs, and tutorials assume standard tuning unless they specifically say otherwise.

How the six strings relate to each other

The strings in standard tuning do not jump around randomly. Each string is tuned to a specific interval (distance in pitch) from the one next to it. The low E string to the A string is a jump of five semitones. The A to the D is also five semitones. The D to the G is five semitones. Then the G to the B is only four semitones—this is the one break in the pattern. Finally, the B to the high E is five semitones again.

This pattern matters because it determines how chords and scales sit on the neck. Once you learn a chord shape on one part of the fretboard, you can move it up or down and it will still be the same chord, just higher or lower. That consistency is why standard tuning has stayed standard for centuries.

If you have a tuner, you do not need to think about semitones—the tuner will tell you which note each string should be. But if you are learning to tune by ear, understanding that the intervals are mostly five semitones (except between G and B) gives you a mental map of what you are listening for.

Recognizing standard tuning by ear

The most reliable way to recognize standard tuning is to pluck each open string one at a time and listen to whether it matches a reference pitch. A digital tuner (free apps exist for phones) will show you when ready whether each string is in tune. You hold the phone near the guitar, pluck a string, and the tuner displays the note name and whether you are sharp (too high) or flat (too low).

If you want to train your ear, the low E string has a deep, resonant sound—it is the lowest note most guitars can play. The A string is noticeably higher but still in the bass range. The D string moves into the midrange. The G string is higher still. The B string is thin and bright. The high E string is the thinnest and highest, though it is the same note name as the low E, just two octaves higher.

A useful trick: if you play the low E string and then the high E string, they should sound like the same note, just one much lower and one much higher. If they do not, at least one of them is out of tune. This gives you a quick sanity check without needing a tuner.

Why E is the reference note

Guitar makers and musicians settled on E as the lowest note partly because of physics and partly because of history. The guitar's body and neck are designed to handle the tension of strings tuned to E without excessive stress. If you tuned the low string much lower, the tension would be so great that the neck would bend. If you tuned it much higher, the strings would be so tight they would be hard to press down and would break easily.

E also sits in a range where the guitar sounds full and rich without being so low that the notes become muddy. It leaves room for bass instruments to sit below the guitar in a band, while still giving the guitar a strong, resonant low end. Over time, this tuning became the default, and now almost every guitar method, songbook, and online tutorial assumes you are using it.

What happens if you use a different tuning

Some players tune their guitars to other notes or use different intervals between strings. These are called alternate tunings, and they change how the guitar sounds and how chords are played. For example, dropping the low E string down to D (called "drop D tuning") makes the guitar sound heavier and is common in rock and metal music. Other alternate tunings are used in folk, blues, and experimental music.

The important thing to know is that if a song or tutorial does not mention a tuning, it is using standard tuning. If it does mention an alternate tuning, you will need to retune before you start. Using the wrong tuning will make the song sound wrong and the finger positions will not match the instructions.

How to check if your guitar is in standard tuning

The fastest way is to use a tuner app or device. Pluck each string one at a time, starting with the thickest, and check that it reads E, A, D, G, B, E in order. If any string is off, adjust the tuning peg for that string until the tuner shows the correct note.

If you do not have a tuner, you can use a reference pitch from a piano, another guitar, or a tuning fork. Pluck the low E string and match it to your reference E. Then tune the A string by playing the fifth fret of the low E string (which is also an A) and matching it to the open A string. Repeat this process for each string: the fifth fret of one string usually matches the open string below it, except between the G and B strings, where you use the fourth fret of the G string to match the open B.

This method takes practice but works without any electronic tools. Many players learn it as a backup in case their tuner dies or they do not have access to one.

Frequently Asked Questions

Is standard tuning the same for all guitars?

Standard tuning is the same for all six-string acoustic and electric guitars. However, 12-string guitars, bass guitars, and extended-range guitars (seven strings or more) use different tunings. If you are learning on a standard six-string guitar, standard tuning is what you will use unless you deliberately switch to an alternate tuning.

Can I tune my guitar to a different key?

You can retune all six strings to a different key (for example, tuning the low string to D instead of E), but this changes how every chord and scale works on the neck. Most players keep standard tuning and instead use a capo or transpose songs mentally. Alternate tunings are a deliberate choice for specific sounds, not a way to change keys.

What if I tune my guitar and it sounds wrong?

If each string reads as in-tune on a tuner but the guitar still sounds off, check that you are tuning to standard tuning and not accidentally setting it to an alternate tuning. Also make sure the tuner is reading the correct octave—some tuners can misread a string as being an octave higher or lower than it should be. If the tuner is correct and the strings are in tune with each other, the guitar is tuned correctly; the sound you are hearing may just be unfamiliar.

Do I need to retune every time I play?

Most guitars drift slightly out of tune during playing because of string stretching and temperature changes. Checking your tuning before each practice session or performance is normal. New strings go out of tune faster than old ones. Once strings have settled in (usually after a few days of playing), they hold their tuning better.