Blues and Slide Guitar Tunings: The Most Used

Blues and slide guitar are dominated by open tunings: Open G, Open D, and Open E. The reason is simple: with an open tuning, the six open strings already form a major chord, so a bar laid across the strings (the bottleneck) gives you a full chord at any fret.

In short: all three open tunings sound a major chord on the open strings. The slide glides across the strings and at every fret you get a new full major chord — something impossible in standard tuning.

Why open tunings are perfect for slide

A slide (or bottleneck) is a glass or metal cylinder you lay across the strings without pressing down on the frets. In standard EADGBE tuning, the open strings don't form a chord: laying the bar straight across gives you a pile of dissonant, unusable notes.

With an open tuning, everything changes. The open strings are already a major chord, so the bar raises every string by the same amount and produces another full, in-tune major chord at every fret. That's the principle that makes open tunings irreplaceable for slide guitar and, more broadly, for blues. The price you pay is that your standard-tuning chord shapes no longer apply — you have to relearn your chords.

Open G: G major on the open strings

Open G tunes the strings to D G D G B D, a G major chord on the open strings. It's one of the most-loved open tunings in blues and rock guitar, often played in a five-string version too (with the 6th string removed).

Open D: D major on the open strings

Open D tunes the strings to D A D F# A D, a D major chord on the open strings. It has a warm, deep tone, widely used in acoustic slide and blues fingerstyle.

Open E: same chord, more tension

Open E tunes the strings to E B E G# B E, an E major chord on the open strings. The interval pattern is identical to Open D, just a whole step higher, which is why it sounds brighter and more ringing — ideal for electric slide.

Watch out for tension, though. Compared to standard, the 5th and 4th strings go up a full step (from A to B and from D to E) and the 3rd goes up a half step (from G to G#): three strings tuned higher means more stress on the neck. On delicate or vintage guitars, many players prefer Open D, which gives you the same kind of chord but lower, without forcing anything. If you're moving to Open E with a browser-based chromatic tuner like EasyGuitarTuner, work your way up to the target notes slowly, checking one string at a time.

What about Open A?

There's also Open A, which relates to Open G the way Open E relates to Open D: the same interval pattern, just a whole step higher. It sounds brighter than Open G and, just like Open E, puts more tension on the strings. If you want that color without stressing the neck, Open G remains the safer choice.

Which open tuning to choose for blues slide

There's no single perfect open tuning — it depends on the sound you're after and on the guitar itself.

• Open G and Open D: the most comfortable and commonly used, with modest tension — great for getting started with slide.
• Open E and Open A: brighter and more powerful, but they pull harder on the strings; better with light-gauge sets or sturdy guitars.
• Historically: blues slide grew out of the Delta blues tradition, where open tunings were the norm. For some famous examples, check out famous guitarists' tunings.

The practical tip: start with Open D or Open G, get comfortable with the bar, and only then try the higher variants.