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Drop B Guitar Tuner.

A low B foundation with dropped-string intervals.

Tune open strings first. Fit your capo, then switch on “Check with capo on”.

Drop BB F♯ B E G♯ C♯
REFERENCE TONEA4 = 440 Hz
B1
B · 6th string61.74 Hz

Choose a string below to hear its note.

PLAY A STRINGThickest Thinnest
6 strings · 3 seconds each
Sound & advanced settings

A gentle ping follows a steady note within 5 cents. Its volume follows the sound slider. Microphone audio stays on your device.

Check your intonation.

Compare one open string with the same string pressed at fret 12. Remove your capo and mute the other strings.

  1. 1. Tune and measure the open string
  2. 2. Press at fret 12 and measure again

Press just behind fret 12 with normal pressure. Do not play a harmonic. Repeat the comparison to confirm the result.

Check your six strings.

Press start, then sweep gently across all six open strings, from thickest to thinnest. Let them ring together.

Experimental: overlapping notes can be unclear. Select any result to measure that string alone in this window.

Check a known reference.

Play a steady reference from another device or instrument whose frequency you know. Enter that frequency below.

This compares your input with the reference you supply. It is not a certified calibration. Only numbers are saved, never audio.
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By ear: click a note, match your string, then move to the next. Keyboard: 1–6 to play · Esc to stop

KNOW YOUR TUNING

Drop B: B F♯ B E G♯ C♯

Starting in C sharp standard, lower the thickest string another whole step. Use this six-string setup only with a suitable string gauge and instrument setup.

The table shows the open-string setup at A4 = 440 Hz. For capo pitches, use the capo controls above.

Drop B notes and frequencies from thickest to thinnest
StringNoteHzFrom standard
6 · thickestB161.745 semitones lower
5F♯292.503 semitones lower
4B2123.473 semitones lower
3E3164.813 semitones lower
2G♯3207.653 semitones lower
1 · thinnestC♯4277.183 semitones lower

THE TUNEGUITAR GUIDE

Understand Drop B

TuneGuitar guide · Updated 6 October 2026 · How we prepare our guides

B F sharp B is the defining bottom end

The bottom three strings form a root, fifth and octave. That is the dropped-string relationship used by this six-string preset. A baritone in B standard starts B E A instead, while a seven-string guitar in standard has an extra string. These layouts all contain a low B but require different fingerings and targets.

Start from C sharp standard

In C sharp standard the upper five targets already match. Lower string 6 from C sharp2 to B1 and recheck the guitar. From ordinary standard, the sixth string falls five semitones and the others three. That unequal movement is the reason an ordinary 'three semitones down' instruction cannot describe the entire setup.

Assess the low string in context

B1 is approximately 61.74 Hz at A4 = 440 Hz. Check it alone, then test a simple low-string shape with your normal attack. A steady open reading followed by sharp fretted notes points to a different issue from an unstable microphone reading. Keep those two observations separate when deciding whether to adjust technique, input position or the guitar's setup.

Your string-by-string route from standard

This is a comparison of target pitches, not a recommendation to use every tuning on every guitar. Start from the tuning your instrument actually has. Use the directions and the octave labels together.

Standard → Drop B
StringStartTargetAdjustment
6E2B1Lower 5 semitones
5A2F♯2Lower 3 semitones
4D3B2Lower 3 semitones
3G3E3Lower 3 semitones
2B3G♯3Lower 3 semitones
1E4C♯4Lower 3 semitones

Nearby tunings, compared by their actual notes

These are the three closest six-string presets by total semitone movement from this setup. The ranking describes target changes, not playing difficulty or physical suitability. A familiar name can hide a different middle-string layout.

What changes from this tuning?
Next tuningAll target notesStrings that change
C♯ standardC♯2 · F♯2 · B2 · E3 · G♯3 · C♯46
C standardC2 · F2 · A♯2 · D♯3 · G3 · C46, 5, 4, 3, 2, 1
Drop CC2 · G2 · C3 · F3 · A3 · D46, 5, 4, 3, 2, 1

READY FOR THE FIRST CHORD

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GOOD TO KNOW

Questions about Drop B

Is this seven-string B standard?

No. This six-string tuning is B F sharp B E G sharp C sharp. Seven-string standard is B E A D G B E.

Why is the fifth string F-sharp rather than E?

Drop B here uses the dropped interval pattern: B1 F-sharp2 B2 E3 G-sharp3 C-sharp4. B-standard baritone tuning uses E2 on string 5 and different notes above it. Sharing a low B does not make those two presets equivalent.

Can I use my Drop C fingerings in Drop B?

Their relative intervals match, so the same shapes sound one semitone lower in Drop B. Tune every string down one semitone from Drop C, not just the bass. The change table provides the individual targets for that move.

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Last updated 13 September 2026.

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Enter 4 to 12 notes in physical string order, from the thickest side. Include the octave, for example E2 A2 D3 G3 B3 E4. Use notes suitable for your strings and instrument.

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