How to Tune a Seven-String Guitar

Standard seven-string tuning

From the thickest seventh string to the thinnest first string, standard tuning is B1 E2 A2 D3 G3 B3 E4. Strings six through one are identical to standard six-string tuning; the added seventh string extends the range downward to B.

This standard sequence is confirmed by current seven-string guitar specifications from manufacturers such as Ibanez and by Fender’s extended-range tuning guidance.

How to tune a seven-string guitar

1. Use a chromatic tuner capable of detecting the low B clearly.
2. Mute the other strings and pluck the seventh string moderately.
3. Tune the low string to B1, allowing the sharp initial attack to settle.
4. Tune strings six through one to E A D G B E.
5. Repeat all seven strings after the first pass.
6. Test low power chords and familiar six-string chords separately.

The current online guitar tuner displays six-string presets, but its chromatic pitch reading can help with the added B. Use the pitch table above and make sure you are not aiming for a higher B octave.

Why the low B can be hard to detect

Low strings produce strong overtones, and a tuner may briefly identify an overtone rather than the fundamental. Pluck closer to the neck with moderate force, mute neighboring strings, and wait for the initial pitch transient to settle. Moving a microphone closer can help, while a clip-on or direct-input tuner may perform better in a noisy room.

Drop A on a seven-string

A common variation lowers only the seventh string from B to A, producing A E A D G B E. The lowest three strings then form A E A, supporting one-finger power-chord shapes across the seventh and sixth strings while preserving standard tuning on the upper six.

Other seven-string tunings

Some players tune every string down a whole step to A D G C F A D or use other custom arrangements. Factory specifications can also vary by model; certain extended-scale instruments ship below standard. Before copying a tuning, confirm the exact seven-note sequence rather than relying only on a label such as “Drop A.”

Scale length and string gauge

Many seven-string guitars use a standard 25.5-inch scale, while extended or multiscale designs can make the low string feel firmer. A thicker low B can improve tension but may require a wider nut slot and intonation adjustment. Avoid forcing an oversized string through a narrow slot.

The appropriate gauge depends on scale length, tuning, picking style, and desired feel. Use the string gauge guide as a starting point and consult a technician for major changes.

Common problems

• The low B reads sharp: use a lighter attack and measure after the initial transient.
• The low B buzzes: inspect action, relief, nut fit, and string gauge.
• Power chords sound unclear: mute unused lower strings and reduce gain while diagnosing.
• Upper chords sound wrong: confirm that strings six through one remain E A D G B E.
• Frets disagree with open strings: check intonation.

Using six-string chord shapes

You can ignore or mute the seventh string and use familiar six-string shapes normally. To incorporate the low B, learn the note names on that string and recognize that its fifth fret is E, matching the open sixth string. This provides an easy unison check and helps map existing riffs into the extended range.

A reliable final check

Tune in two passes, play the low B against the sixth-string E at the fifth fret, and test both low and upper-register chords. If the seventh string repeatedly drifts, follow the tuning stability checklist.