What Is an Enharmonic Equivalent?

Enharmonic equivalents are two different note names for the exact same pitch. F♯ and G♭ are the same fret on the same string; so are C♯/D♭, D♯/E♭, G♯/A♭, and A♯/B♭. Nothing about the sound changes — only the spelling.

Why bother with two names?

Because scales need one of each letter. The D major scale is D–E–F♯–G–A–B–C♯: spell that F♯ as G♭ and you'd have two G's and no F, which makes the scale unreadable. The name tells you the note's job in the current key, even though the fret is identical.

A practical rule of thumb: sharp keys (G, D, A, E, B) spell the in-between notes as sharps; flat keys (F, B♭, E♭, A♭) spell them as flats. The circle of fifths sorts all of this out visually.

On the fretboard

Guitarists get a discount here: since one fret = one pitch, you can find the note without caring about its spelling. When you're memorizing the neck, learn the in-between notes once and read them as "F♯-slash-G♭" — the context will pick the name for you later.

Related terms

• Accidental — sharps and flats themselves
• Key — the context that picks the spelling
• Chromatic scale — all twelve pitches, however you spell them