Drop D Tuner Online

What Drop D tuning is

Drop D tuning is D A D G B E (low to high) — standard EADGBE with only one change: the thick low E string is dropped a whole step down to D. Every other string stays exactly where it is, which is why Drop D is the fastest alternate tuning to reach and the easiest to undo mid-set.

Reading the strings low to high: the sixth string is now D (a whole tone below standard E), the fifth stays at A, the fourth stays at D, the third stays at G, the second stays at B, and the first (high) string stays at E. The single dropped string is what does all the work. Because the lowered D sits an octave below your open fourth string, the two Ds ring in unison an octave apart when you have tuned correctly — a built-in reference that makes Drop D one of the few tunings you can check against itself.

Why and when to use it

The reason guitarists love Drop D is the power chord. In standard tuning a power chord (root plus fifth) needs two or three fretting fingers; in Drop D the bottom three strings are tuned to D–A–D, which is a D power chord already. Barring those three strings flat at any fret gives you an instant power chord that you can slide up and down the neck with a single finger. That makes fast, palm-muted riffing far easier and frees your other fingers for embellishments.

The second reason is the low end. Dropping to D extends the guitar's range two semitones lower and gives the open sixth string a deep, resonant growl that standard tuning cannot reach. Rock, grunge, metal and metalcore players reach for it constantly; acoustic singer-songwriters use it for the rich open-D drone under fingerpicked passages. Because only one string moves, all your familiar chord shapes on the top five strings still work — you only have to relearn anything that uses the sixth string root.

String-by-string change from standard

To get there from standard tuning, leave the A, D, G, B and high-E strings completely alone and tune only the low E string down a whole tone to D. The cleanest way to land it by ear is to match the lowered string an octave below your open D (fourth) string: pluck both, and lower the sixth string until the beating between them disappears and the two Ds lock into a clean octave. With the tuner below, simply pluck the low string and lower it until the dial settles inside the green band on D.

Songs and artists that use Drop D

• Everlong — Foo Fighters
• Killing in the Name — Rage Against the Machine
• Slither — Velvet Revolver
• Moby Dick — Led Zeppelin (an early, blues-rock use of the dropped sixth)

These span grunge, funk-metal, hard rock and classic rock, which gives you a sense of how broad Drop D's appeal is — it is not a niche metal-only trick.

Common Genres

• Hard rock and grunge
• Alternative and post-grunge
• Metal and metalcore
• Acoustic singer-songwriter (for the deep open-D drone)

Practical tips and common mistakes

• Mind your reference pitch. Set the reference (A4) below to 440 Hz unless you are deliberately matching a recording at 432 Hz — tuning to the wrong reference makes you sound in tune with yourself but out of tune with everyone else.
• Re-check after dropping. Lowering one string slightly changes the tension on the neck, which can nudge the others a few cents. After you drop the sixth string, pluck the rest and confirm they are still centered.
• Don't over-drop. It is easy to sail past D to C#. Approach the target from below, tightening up to it, so the string settles rather than slips flat.
• Power-chord shape. Once tuned, the one-finger power chord lives on strings six, five and four — barre them at the same fret. The fret number names the chord root, so the third fret is an F power chord, the fifth fret is G, and so on.

How to use this tuner

• Click Start Tuner and allow microphone access when prompted.
• Pluck one string at a time — the matching peg below lights up automatically.
• Tap any peg to hear its exact target pitch as a reference tone.
• Tune the low string down until the dial settles inside the green band on D, then re-check the other five.