Drop and Lower Tunings: What Changes on the Fretboard and What Stays the Same

Three phrases you hear whenever lower tunings come up:

1. "Drop D is just lowering the 6th string."
2. "A lower tuning is just transposing everything down."
3. "The lower it is, the heavier it sounds."

The first is mechanically true and theoretically incomplete. The second is true for low standard tunings (D, C, B) and false for drop tunings. The third is a perception, not an automatic consequence of frequency. This article maps out the tunings most used in modern guitar and works through the numbers that explain why the fretboard "changes shape" when you tune a guitar lower.

Standard, low standard, drop or alternate?

In exact terms, Drop X is the standard tuning whose root sits 2 semitones above X, with the lowest string tuned to X and the rest unchanged. In practice: Drop D comes from E standard (6th string on D, rest A–D–G–B–E); Drop C comes from D standard (6th on C, rest G–C–F–A–D); Drop B comes from C♯ standard (6th on B, rest F♯–B–E–G♯–C♯); Drop A comes from B standard (6th on A, rest E–A–D–F♯–B). The consequence is always the same: the interval between the two lowest strings changes from a perfect fourth (5 semitones) to a perfect fifth (7 semitones) — that's where almost every practical difference comes from.

The most-used tunings

Notice the pairs that share the lowest note but not the interval map: Drop D and D standard both have D2, but only the first has a perfect fifth between the 6th and 5th strings — the same holds between Drop C/C standard and Drop B/B standard. 7-string B standard also passes through B1, but it's standard tuning with an extra low string, not a uniform transposition.

Why the one-finger power chord only exists in drop tunings

In 6-string drop tunings, the 6th, 5th and 4th strings end up tuned to X, X + 7 semitones (perfect fifth) and X + 12 (an octave) — the same holds for the three lowest strings in 7- and 8-string drop tunings. Fret all three at the same fret and you get root + fifth + octave, the classic power chord of modern metal. In drop D, at the 5th fret:

6th: D2 + 5 = G2   (root)
5th: A2 + 5 = D3   (perfect fifth)
4th: D3 + 5 = G3   (octave)

In E standard, the same position gives root, fourth and minor seventh — nothing like a power chord. That's why drop tunings are so tied to parallel-fifth riffing, and also why the octave of the lowest string sits on the 4th string, at the same fret (instead of two frets up, as in standard tuning).

The circle of fifths for Drop tunings is built on this: pick a tuning and a mode and it shows on which fret of the lowest string each chord of the key sits.

There's another effect that gets talked about less: if the lowest string drops s semitones, the same pitch shows up s frets further up that string — Drop D: +2 frets; Drop C: +4; Drop B: +5; Drop A: +7. C3, for example, sits on the 8th fret of the 6th string in E standard; in drop D it moves to the 10th; in drop C, the 12th.

What never changes: the notes, the scale and chord formulas, and the harmonic functions — only the relationship with the lowest string shifts. That's the central distinction between low standard tunings and drop tunings:

With 24 frets, nearly all of these tunings span exactly 4 octaves between the lowest and highest string — except the drop tunings, which pick up 2 extra semitones at the bottom. The extreme case is the 8-string in drop E: E1 to E6 is exactly 60 semitones, or 5 octaves, and E1 (41.20 Hz) is the same frequency as the lowest string of a 4-string bass.

Tension, gauge and scale length

Physics explains the "floppy strings" feeling when you tune down. For an ideal string, f = (1/2L) × √(T/μ), where L is the vibrating length, T is tension and μ is mass per unit length — which gives T = 4 × L² × f² × μ. Dropping s semitones multiplies tension by 2^(−s/6); to restore it with the same string construction, diameter has to increase by roughly 2^(s/12).

These are ideal-string estimates — real construction (core + winding) changes the result, and most guitarists deliberately accept less tension rather than restoring it fully with thicker gauges.

Scale length matters too, because tension grows with L²: a 27" baritone carries about 12% more tension than a 25.5" standard scale at the same tuning, and a 30" reaches 38% more — it's not "magic", it's just the equation. That's why baritones can handle lower tunings with less extreme string gauges.

• Drop D: a 10–46 set is usually fine; for more firmness, 11–49/52.
• Drop C: typically 11–52 or 12–56.
• Drop B / Drop A: 12–60, 13–62, or a baritone scale length.
• 7/8 strings: dedicated sets, with much thicker low strings.

These figures are indicative — they depend on scale length, string construction, action and your own playing.

Intonation and setup

Dropping the tuning without touching the rest of the guitar has a cost: less tension means more lateral vibration and fret buzz; thicker strings need wider nut slots; and with less baseline tension, fretting a note pulls it sharper, which means bridge compensation has to be re-checked. A guitar that's in tune open but has out-of-tune chords in a lower tuning is almost always just overdue for an intonation adjustment.

The myths, summarised

Try it yourself

1. Write out the six notes of Drop C and the frequency of the lowest one.
2. In Drop D, play the 6th, 5th and 4th strings at the 5th fret. What interval do they form?
3. If you drop 5 semitones (Drop B), roughly how much tension do you lose?

Answers. (1) C2 G2 C3 F3 A3 D4; C2 = 65.41 Hz. (2) G2, D3, G3 — root, perfect fifth and octave: a power chord. (3) ≈43.9%; diameter would have to increase ×1.335 to restore tension.

Keep going

To see these numbers applied to a specific tuning, read Drop C Tuning: Notes, Power Chords and the Scales to Learn First. To pick the right instrument for lower tunings, How to Choose a Guitar for Drop Tunings and Baritone vs Multiscale vs 7-String carry on from here.

Sources

Numbers recalculated independently (f = 440 × 2^((m−69)/12), T ∝ f², T ∝ L²; ranges calculated from 24 frets). Sources checked on 24 October 2026, for definitions and for values confirmed by calculation:

• Wikipedia: Guitar tunings
• Wikipedia: Drop D tuning
• Wikipedia: Mersenne's laws
• Wikipedia: Seven-string guitar
• Wikipedia: Eight-string guitar
• Wikipedia: Baritone guitar