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Lesson 24 Intermediate Chapter III — Intermediate Skills

Guitar Sharps, Flats & Natural Signs Explained

The seven natural notes A–G only cover part of the fingerboard. Sharps and flats fill in the gaps — and once you understand them, the entire guitar neck opens up.

Natural Notes and the Gaps

The seven natural notes — A, B, C, D, E, F, G — cover most of the fingerboard, but not all of it. Between most pairs of natural notes there is a gap: an extra fret that has no natural letter name. These unnamed positions are the sharps and flats.

There are two important exceptions: there is no sharp or flat between B and C, or between E and F. These pairs are already only one fret apart — a semitone — so there is no room for a note between them.

No Gap Here

B → C: no sharp or flat between them. They are already one fret apart.
E → F: same — one fret apart, no gap.

Gap Here

Between every other pair of natural notes (A–B, C–D, D–E, F–G, G–A) there is one fret gap containing a sharp or flat note.

Sharps (#)

A sharp note is one fret position higher than the natural note with the same letter name. The sharp sign looks like a hash: #

On the stave, a sharp sign appears immediately before the note head it applies to. On the guitar, simply play the same string one fret higher than the natural note.

✦ Sharp = One Fret Higher

Every sharp note is exactly one fret higher than its natural counterpart on the same string. F sharp on the 1st string is at fret 2 (F natural is at fret 1). G sharp on the 1st string is at fret 4 (G natural is at fret 3).

Flats (b)

A flat note is one fret position lower than the natural note with the same letter name. The flat sign looks like a lowercase b: b

On the stave, a flat sign appears immediately before the note head. On the guitar, play the same string one fret lower. If the natural note is an open string, move to the next lower fret on the same string.

Enharmonic Equivalents

F# and Gb are different names for exactly the same pitch — the same fret on the same string. Notes that share the same pitch but have different names are called enharmonic equivalents.

All sharp/flat pairs are enharmonic:

Which name is used depends on the musical context — specifically the key signature the music is written in. In the key of G, the note between F and G is called F#. In the key of Db, the same pitch is called Gb.

Sharp and Flat Signs on the Stave

When a sharp or flat sign appears before a note on the stave, it affects:

  1. That specific note
  2. Every subsequent note of the same name in the same position in that bar

It does not carry over into the next bar — the effect is automatically cancelled by the next bar line.

⚠ The Natural Sign

If a sharp or flat appears earlier in a bar and you need the natural version of that note in the same bar, a natural sign (♮) is placed before it. The natural sign cancels the sharp or flat for the rest of that bar only.

What's Next?

Lesson 25 maps out all the natural, sharp, and flat notes on all six strings up to the 4th fret — giving you a complete reference chart for the entire first position of the guitar neck.

Questions & Answers

Frequently Asked Questions

Common questions about guitar sharps, flats & natural signs explained

A sharp note is one fret position higher than the natural note with the same letter name. For example, F sharp (F#) is played one fret higher than F natural. On the 1st string, F natural is at the 1st fret and F# is at the 2nd fret. A sharp sign looks like a hash symbol: #

A flat note is one fret position lower than the natural note with the same letter name. For example, G flat (Gb) is played one fret lower than G natural. A flat sign looks like a lowercase b: b. Flat notes appear in the key signatures of F major, Bb major, Eb major, and others.

Enharmonic notes are two different names for the same pitch played on the same fret. F# and Gb are enharmonic — they are the same note but named differently depending on the musical context. All sharp and flat pairs work this way: A#=Bb, C#=Db, D#=Eb, G#=Ab.

No — there are no sharps or flats between B and C, or between E and F. These pairs of natural notes are already only one fret apart (a semitone), leaving no room for a note between them. All other adjacent natural notes have a sharp or flat between them.

A natural sign (♮) cancels a sharp or flat that was written earlier in the same bar. It returns the note to its plain, unaltered pitch. For example, if F# was written at the start of a bar and then a natural sign appears before another F, that second F is played as F natural, not F#.

When a sharp or flat sign appears before a note, it affects every subsequent note of the same name and position in the same bar — even without the sign being repeated. A natural sign is required to cancel it within that bar. In the next bar, the effect is cancelled automatically.