F#aug Guitar Chord
F# Augmented · also written Gbaug · F#–A#–D
F#aug is the F# augmented chord: F#–A#–D. Its sound is dreamlike and unsettled — the raised 5th makes it float, perfect for transitions. It's also written as Gbaug — same notes, same shapes, different spelling.
F#aug raises the 5th of F# major by a half-step, splitting the octave into equal major 3rds. Like the diminished chord it's symmetrical — the same shape three frets up spells another augmented chord. Songwriters use it to lift from I toward IV or vi (think the intro of "Oh! Darling").
The most common way to play F#aug is the augmented grip at the 2nd fret (2 x 4 3 3 2, low E string to high E string). Below you'll find 3 ways to play it across the neck, from open position to barre and shell voicings, with the theory behind the chord and the progressions it lives in.
How to Play F#aug: 3 Voicings
Frets are listed from the low E string to the high E string. x = don't play that string, 0 = open string.
F#aug Chord Theory
| Interval | R | 3 | #5 |
|---|---|---|---|
| Note | F# | A# | D |
F#aug is built from the F# major scale.
F#aug Chord FAQ
What notes are in the F#aug chord?
F#aug contains 3 notes: F# (R), A# (3), D (#5). The interval formula for a augmented chord is R–3–#5.
What is the easiest way to play F#aug on guitar?
Use the augmented grip at the 2nd fret: 2 x 4 3 3 2 (frets listed from the low E string to the high E string, x = don't play that string). F#aug has no open-position shape in standard tuning, so this movable form is the standard starting point.
Is F#aug a major or minor chord?
F#aug is built on a major triad (F#–A#–D) with the #5 added, so it behaves as a major-family chord.
Is F#aug the same as Gbaug?
Yes. F# and Gb are enharmonic equivalents — the same pitch written two ways. F#aug and Gbaug use identical shapes and frets; which spelling you see depends on the key of the song.
What keys use the F#aug chord?
F#aug appears diatonically in F# major (as I), Db major (as IV), and B major (as V) — plus Eb minor, its relative minor key.
Related Chords
Hear yourself play F#aug
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