Drop D Tuner Online — DADGBe Guitar Tuning

Drop D tuning lowers the guitar’s sixth string from E2 to D2, giving DADGBe from low to high. The other five strings stay in standard tuning. The lowered bass note lets a single fretted finger produce a power chord across the bottom three strings.

How to use it

1. Start from standard tuning. Drop D changes one string, so the quickest route is to tune the guitar to EADGBE first and then move the sixth string.
2. Lower the sixth string to D2 (73.42 Hz). Turn the peg down slowly. The pitch you are aiming for is exactly one whole tone below the E2 you started on.
3. Leave strings five to one alone. Do not touch the fifth string; it stays at A2 = 110.00 Hz. If the sixth string will not settle, check that you have not accidentally moved its neighbour.
4. Check the low D against the fourth string. The fourth string is also a D, one octave higher at D3 = 146.83 Hz. Playing the sixth string and hearing a clean octave against the open fourth string confirms the drop without needing the display.
5. Play the bottom three strings open. D–A–D is a D5 power chord. Barring those three strings at the third fret gives F5, and the same one-finger shape moves the whole riff vocabulary down a whole tone.
6. Return to standard by tuning the sixth string back up. Bring it to E2 in small steps and re-check the fifth string.

If you tune by ear instead of by microphone, the drop is a whole tone: play the sixth string at the seventh fret, which sounds A2, and match it to the open fifth string. Then play the sixth string at the twelfth fret and match it to the open fourth string. That confirms D2 without a reference pitch.

Drop D string frequencies

String	Note	Frequency (A4 = 440 Hz)
6th (dropped)	D2	73.42 Hz
5th	A2	110.00 Hz
4th	D3	146.83 Hz
3rd	G3	196.00 Hz
2nd	B3	246.94 Hz
1st	E4	329.63 Hz

Why drop D exists

The open sixth, fifth and fourth strings in drop D are D, A and D. Those three notes spell a D power chord with no third, which is why a single finger barre across them produces a complete-sounding chord. In standard tuning the same three open strings are E, A and D, which is not a chord at all.

The practical results:

• Riffs sit lower. The lowest note available drops from E2 to D2, a whole tone. The same shape played on the bottom three strings now sounds a whole tone heavier.
• Power chords need one finger. Barre the bottom three strings anywhere and the shape is a fifth plus an octave. Chord changes that would need two or three fingers in standard tuning collapse to one.
• Scale and chord shapes on the top five strings do not change. The fourth, third, second and first strings keep their standard pitches, so lead playing and open chords above the dropped string are unaffected.
• Folk and fingerstyle players use it too. The low D gives a drone under standard fingerpicking patterns, which is why drop D appears in folk and singer-songwriter writing as well as rock and metal.

Drop D is not the same as D standard (DGCFAD) and not the same as drop C (CGCFAD). If you want the same feel another whole tone lower, that is the drop C page.

Accuracy and limits

• Two strings carry the note D, an octave apart. The sixth string is D2 and the fourth is D3. The display reports the pitch it hears, so if you pluck the sixth while the fourth rings, the reading can be the higher D — a real note, the wrong string. Mute the unused strings and check the card for the string you played; the open fourth string is also a useful by-ear octave check on the drop.
• The dropped string is now the microphone’s problem. D2 at 73.42 Hz is a whole tone below the E2 the microphone was working with before, and it is the lowest note in the tuning. Small laptop and phone microphones are least sensitive in that region (typically below ~100 Hz), so the sixth string arrives weaker than the five strings above it. Pluck it firmly with the side of your thumb over the 12th fret, hold the note for about a second, and keep the guitar close to the microphone.
• A light pluck or a decayed note reads worst. A very gentle pluck gives the detector little to work with, and a note that has already faded gives it less. Judge the string by where the needle settles after a firm pluck, not by the first frame.
• A loud room defeats any tuner. Speech, fans and other instruments compete with the note. A quiet room, or a clip-on tuner, is more reliable than fighting the noise.

A string that will not settle at all — flickering, or reading a different note each frame — is usually a second string ringing rather than a fault; muting the unused strings and re-plucking resolves it.

Safety

• Dropping the sixth string is safe. You are removing tension, not adding it, so the drop itself puts no unusual load on the neck or bridge.
• Returning to standard is where care matters. Raise the sixth string to E2 in small increments. Tuning a low string up a whole tone in one motion is how strings break and how pegs get forced.
• Do not use the fifth string as a handle. When you turn the sixth string’s peg, brace the headstock with your other hand rather than pulling on a neighbouring string.
• If the low D rattles against the frets, adjust the setup, not the pitch. Tuning the string sharp to stop a buzz puts the guitar out of tune and does not fix the cause.
• Watch the nut slot. A sixth string that has been at D2 for a long time can sit loosely in its slot; if it slips or pings while tuning, have the nut checked rather than over-tightening the peg.
• Keep the string winding tidy on the post. A neat, downward winding holds pitch better than a loose coil, especially on the string you retune most often.

Drop D, D standard and drop C at a glance

Tuning	Sixth string	Other strings	Lowest note
Standard	E2 (82.41 Hz)	Standard	E2
Drop D	D2 (73.42 Hz)	Standard	D2
D standard	D2 (73.42 Hz)	All down a whole tone	D2
Drop C	C2 (65.41 Hz)	All down a whole tone	C2

The distinction that matters most: drop D and D standard share a lowest note but not a fretboard. Drop D keeps standard shapes on five strings; D standard keeps the shape relationships of standard tuning but moves every string. Choose drop D when you want the low D under familiar shapes, and D standard when you want the whole instrument lower with standard intervals intact.