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Chord · F# Dominant 7th

F7 Chord

F7 is F#, A#, C# and Etense; wants to resolve down a fifth. Blues and jazz workhorse.

Hear it

F7 on every instrument

The same 4 notes, 6 sets of hands. Open a diagram for alternate shapes, audio and the mistakes to avoid.

131211EADGBE
Guitar2 voicings
CDEFGAB
Piano3 voicings
9fr1211GCEA
Ukulele1 voicing
1312EADG
Bass1 voicing
8fr2134GDAE
Mandolin1 voicing
×11fr4111GDGBD
Banjo1 voicing

What F7 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 F7.

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 F7

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 F7 behaves the way it does — the guides that explain the chord instead of just spelling it.

Barre Chords — The Wall Every Guitarist ClimbsThis one asks for a barre. The article is the fix for the buzzing and the aching hand.7 min readFunctional Harmony: Three Roles, One EngineWhat a seventh chord is for — tension, resolution, and the seat it takes in the key.6 min readThe 12-Bar Blues — Three Chords, A Century of HitsSeventh chords are the whole sound of the blues. Twelve bars is where to hear it.7 min read