Chord · F# Dominant 7th
F♯7 Chord
F♯7 is F#, A#, C# and E — tense; wants to resolve down a fifth. Blues and jazz workhorse.
F♯7 on every instrument
The same 4 notes, 6 sets of hands. Open a diagram for alternate shapes, audio and the mistakes to avoid.
What F♯7 is made of
F#7 (F# seventh) is built from the notes F#, A#, C#, E, with the interval pattern 1, 3, 5, b7.
Stack 1, 3, 5 and b7 on a root of F♯ and you get F#, A#, C# and E. That interval recipe is what makes the chord a seventh chord — move the same shape to another root and the character travels with it, which is why C7 sounds like a transposed F♯7.
Dominant 7th: Tense; wants to resolve down a fifth. Blues and jazz workhorse.
Spelling: the notes above are written the way a score would write them, not simplified to the nearest piano key. That is why this chord is spelled with F♯ rather than its enharmonic equivalent.
Keys that contain F♯7
All 4 notes sit inside the scale of 4 keys. The roman numeral marks the degree the chord is rooted on.
Other chords on F♯
Same root, different colour.
The same seventh shape, moved
The identical interval recipe, built on other roots.
Questions people ask about F#7
- What notes are in the F#7 chord?
- F#7 is made of F#, A#, C# and E — the 1, 3, 5 and b7 degrees of a seventh chord built on F#.
- What keys use the F#7 chord?
- Every note of F#7 belongs to 4 keys: B Major (V), Cb Major (V), G# Minor (VII), Ab Minor (VII). The roman numeral is the scale degree the chord is rooted on.
- How do you play F#7 on guitar and piano?
- This page shows F#7 on guitar, piano, ukulele, bass, mandolin and banjo — 9 voicings in total. Each diagram links to the full instrument page with alternate shapes, audio and common mistakes.
- Is F#7 the same as Gb7?
- Yes. F#7 and Gb7 are enharmonic — identical pitches written two different ways. Which spelling you use depends on the key you are in; F#7 is the spelling this site treats as canonical.
Learn the theory behind it
Why F♯7 behaves the way it does — the guides that explain the chord instead of just spelling it.