Guitar Tuning Guide: Standard, Alternate, and Drop Tunings Explained

A guitar that is out of tune will never sound good, no matter how well you play. Tuning is the first skill every guitarist must master, and it is also a gateway to creative exploration. Once you understand how tuning works, you open the door to alternate tunings that can transform your sound, simplify difficult chord shapes, and inspire entirely new songs. In this guide, we cover everything from the basics of standard tuning to the most popular alternate and drop tunings used in rock, folk, blues, and beyond.

Why Tuning Matters

Every string on your guitar is tuned to a specific pitch. When all six strings are tuned correctly relative to each other, chords and scales sound harmonious. When even one string is off, everything you play will sound dissonant and wrong. Tuning is not a one-time task — guitars go out tune due to temperature changes, humidity, string stretching, and even aggressive playing. Professional guitarists check their tuning before every song, and you should too.

Standard Tuning Explained

Standard tuning is the default tuning for most guitar music. From the lowest (thickest) string to the highest (thinnest), the notes are:

• 6th string (low E): E
• 5th string: A
• 4th string: D
• 3rd string: G
• 2nd string: B
• 1st string (high E): E

A common mnemonic to remember this is "Elephant And Donkey Got Big Ears" or "Eddie Ate Dynamite, Good Bye Eddie."

Standard tuning is designed so that common chord shapes are physically comfortable to play. The interval between most adjacent strings is a perfect fourth (five semitones), except between the G and B strings, which is a major third (four semitones). This irregularity is what makes standard tuning work — it allows barre chords and scale patterns to be practical across the neck.

How to Tune Your Guitar

Using an Electronic Tuner

The easiest and most accurate way to tune is with an electronic tuner. You can use a clip-on tuner that attaches to your headstock, a pedal tuner for electric guitars, or a free tuning app on your phone. Simply pluck each string and adjust the tuning peg until the tuner shows the correct note and the needle or indicator is centered.

Tuning by Ear (Relative Tuning)

If you do not have a tuner, you can tune the guitar relative to itself using the fifth-fret method:

1. Assume the 6th string (low E) is in tune (or tune it to any reference pitch).
2. Press the 5th fret of the 6th string — this produces an A note. Tune the open 5th string to match this pitch.
3. Press the 5th fret of the 5th string — this produces a D. Tune the open 4th string to match.
4. Press the 5th fret of the 4th string — this produces a G. Tune the open 3rd string to match.
5. Press the 4th fret of the 3rd string — this produces a B. Tune the open 2nd string to match.
6. Press the 5th fret of the 2nd string — this produces an E. Tune the open 1st string to match.

Note the exception at step 5: the 4th fret is used instead of the 5th because of the major-third interval between the G and B strings.

Using Harmonics

More advanced players can tune using natural harmonics. Lightly touch a string directly above the 12th fret (without pressing down) and pluck to produce a bell-like harmonic tone. The harmonic at the 5th fret of a lower string matches the harmonic at the 7th fret of the next higher string for most string pairs. Again, the G-to-B pair is the exception.

Popular Alternate Tunings

Alternate tunings change the pitch of one or more strings from standard tuning. They can make certain chords easier to play, create new voicings impossible in standard tuning, or produce a specific "drone" or open-string sound.

Open G Tuning (D-G-D-G-B-D)

Open G is one of the most iconic alternate tunings. Strumming all open strings produces a G major chord. Keith Richards of The Rolling Stones used open G extensively on songs like "Brown Sugar" and "Start Me Up." To tune to open G:

• Tune the 6th string down one whole step from E to D
• Tune the 5th string down one whole step from A to G
• Leave the 4th, 3rd, and 2nd strings as D, G, and B
• Tune the 1st string down one whole step from E to D

Open D Tuning (D-A-D-F#-A-D)

Similar to open G but rooted on D, this tuning produces a D major chord when all strings are strummed open. It has a rich, resonant sound popular in folk and blues. Joni Mitchell and Bob Dylan both used open D extensively.

• Tune the 6th string down from E to D
• Tune the 5th string down from A to D (one whole step down)
• Tune the 4th string down from D... actually, leave the 4th as D
• Tune the 3rd string down from G to F# (one half step down)
• Leave the 2nd string as B... actually tune it down from B to A
• Tune the 1st string down from E to D

DADGAD Tuning (D-A-D-G-A-D)

DADGAD is a favorite among folk and Celtic guitarists. It produces a suspended, ambiguous sound that is neither major nor minor when strummed open. Jimmy Page used DADGAD on "Kashmir," and it is a staple of acoustic fingerstyle guitar.

• Tune the 6th string down from E to D
• Leave the 5th string as A
• Leave the 4th string as D
• Leave the 3rd string as G
• Tune the 2nd string down from B to A
• Tune the 1st string down from E to D

Drop D Tuning (D-A-D-G-B-E)

Drop D is the simplest alternate tuning — only the low E string is tuned down one whole step to D. This allows power chords to be played with a single finger across the three lowest strings and gives the low D a heavier, deeper sound. It is used extensively in rock, metal, and folk.

Half-Step Down Tuning (Eb-Ab-Db-Gb-Bb-Eb)

Many rock and blues guitarists tune every string down one half step. This lowers the overall pitch slightly, giving the guitar a warmer, bluesier tone and making string bending easier. Jimi Hendrix, Stevie Ray Vaughan, and Slash all frequently used half-step-down tuning.

Drop Tunings for Heavy Music

In metal and hard rock, guitarists often tune down further to achieve a heavier, darker sound. Common drop tunings include:

• Drop C (C-G-C-F-A-D): Tune all strings down one whole step from standard, then tune the low string down another whole step to C.
• Drop B (B-F#-B-E-G#-C#): Even lower, popular in modern metal and djent.
• Baritone tuning: Some guitarists use baritone guitars with longer scale lengths tuned to B standard (B-E-A-D-F#-B) or lower.

These lower tunings require heavier string gauges to maintain proper tension and avoid floppy strings.

Tips for Staying in Tune

1. Stretch new strings: After putting on new strings, gently stretch each one by pulling it away from the fretboard, then re-tune. Repeat until the string holds its pitch.
2. Store properly: Keep your guitar in a stable environment. Extreme temperature and humidity changes cause strings to expand and contract, going out of tune.
3. Lubricate the nut: A pencil tip rubbed in the nut slots deposits graphite, which acts as a lubricant and helps strings slide smoothly, preventing binding.
4. Wind strings cleanly: When stringing, wind the string neatly on the tuning peg. Overlapping winds can cause the string to slip and go out of tune.
5. Tune up, not down: When a string is slightly sharp, tune it down past the target note and then tune back up to pitch. This removes slack in the tuning peg mechanism.

Using FretGlyph with Alternate Tunings

FretGlyph supports custom tunings for every diagram. If you are working in an alternate tuning like DADGAD or open G, you can set the tuning for each chord diagram individually. This means your chord sheets will always reflect the correct fret positions for whatever tuning you are using. You can also use the chord recognition feature to identify what chord a particular voicing produces in any tuning, which is invaluable when exploring new alternate tunings and discovering unexpected harmonies.

Conclusion

Tuning is the foundation of good guitar playing. Whether you stick with standard tuning or venture into the creative world of alternate tunings, the key is to always check your tuning before you play and to understand how each tuning affects the chords and sounds available to you. With practice, tuning becomes second nature — a thirty-second ritual that ensures everything you play sounds its best. Explore the alternate tunings in this guide, and you may discover a whole new voice for your guitar.