F♯aug7: F♯/G♭ Augmented 7th Piano Chord

Root position: either hand, fingers low note to high
Hand	Notes	Fingers
Right	F♯, A♯, C×, E	2-3-4-5
Left	F♯, A♯, C×, E	5-4-3-2

Scale degree, note, and interval measured from the root.
Degree	Note	Interval from root	Semitones
1	F♯	Perfect unison	0
3	A♯	Major third	4
♯5	C×	Minor sixth	8
♭7	E	Minor seventh	10

Construction

F♯ Augmented 7th = Root + Major 3rd + Minor 6th + Minor 7th = F♯, A♯, C♯♯, E

Note	Interval	Degree
F♯	Root	1
A♯	Major 3rd	3
C♯♯	Minor 6th	♯5
E	Minor 7th	♭7

Fingering

Note	Key color	Right hand	Left hand
F♯	black	index finger (2)	little finger (5)
A♯	black	middle finger (3)	ring finger (4)
C♯♯	white	ring finger (4)	middle finger (3)
E	white	little finger (5)	index finger (2)

Right hand: index finger (2) on F♯, middle finger (3) on A♯, ring finger (4) on C♯♯, little finger (5) on E.

Left hand: little finger (5) on F♯, ring finger (4) on A♯, middle finger (3) on C♯♯, index finger (2) on E.

F♯ Augmented 7th Inversions

Root position
F♯ – A♯ – C♯♯ – E
1st inversion (F♯aug7/A♯)
A♯ – C♯♯ – E – F♯
2nd inversion (F♯aug7/C♯♯)
C♯♯ – E – F♯ – A♯
3rd inversion (F♯aug7/E)
E – F♯ – A♯ – C♯♯

Key Signature

A Augmented 7th chord is built from symmetrical or ambiguous intervals, so it doesn't belong to a single key and has no key signature of its own.

Chords in the Key of F♯ Major

These are the triads built on each degree of F♯ Major:

I — F♯ Major (major)

Degree	Numeral	Chord	Quality
1	I	F♯ Major	Major
2	ii	G♯ Minor	Minor
3	iii	A♯ Minor	Minor
4	IV	B Major	Major
5	V	C♯ Major	Major
6	vi	D♯ Minor	Minor
7	vii°	E♯ Diminished	Diminished

Same Notes, Other Names

The notes F♯ – A♯ – C♯♯ – E aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:

F♯ 7♯5→

F♯ Augmented 7th : Frequently Asked Questions

What is the F♯ Augmented 7th chord on piano?

The F♯ Augmented 7th chord contains the notes F♯ – A♯ – C♯♯ – E. On piano, play these notes together to sound the chord.

What is the F# piano chord?

The F# piano chord (written F♯ Augmented 7th) uses the same keys: F♯ – A♯ – C♯♯ – E. The # and ♯ symbols name the same black key.

What notes are in the F# Augmented 7th chord?

F# Augmented 7th is built from the F# root. Check the interactive keyboard above for exact notes and fingering.

How is the F# Augmented 7th chord used in music?

F# Augmented 7th appears in jazz, pop, and classical contexts. Its sound depends on the chord quality (Augmented 7th).

What is the fingering for F# Augmented 7th?

See the fingering chart above. Right hand typically uses thumb on root. Left hand uses pinky on root.

What are the inversions of F# Augmented 7th?

Use the inversion buttons above to see each inversion with notes, fingering, and staff notation.

F♯ Augmented 7th in detail

Exact

Every pitch class is present and nothing outside the chord is added.

Type	Notes	Semitones	Span	Omissions and additions	Set relation
Close, root position	F♯3 A♯3 C×4 E4	10	138 mm	none	identical
Close, first inversion	A♯3 C×4 E4 F♯4	8	110 mm	none	identical
Close, second inversion	C×4 E4 F♯4 A♯4	8	110 mm	none	identical
Close, third inversion	E4 F♯4 A♯4 C×5	10	138 mm	none	identical
Drop 2	C×3 F♯3 A♯3 E4	14	193 mm	none	identical
Drop 3	A♯2 F♯3 C×4 E4	18	248 mm	none	identical
Drop 2 and 4	F♯2 C×3 A♯3 E4	22	303 mm	none	identical

Reduced

A subset of the pitch classes: the identity is incomplete rather than altered.

Type	Notes	Semitones	Span	Omissions and additions	Set relation
Shell, root ♭7 3	F♯2 E3 A♯3	16	220 mm	omits C×	subset
Guide tones, 3 and ♭7	A♯3 E4	6	83 mm	omits F♯ and C×	subset
Rootless close	A♯3 C×4 E4	6	83 mm	omits F♯	subset

Spans are measured centre to centre at a 165 mm octave (standard keyboard geometry).

Position	Bass note	Notes in order	Figured bass	Semitones	Span
Root position	F♯	F♯3, A♯3, C×4, E4	7	10	138 mm
First inversion: F♯aug7/A♯	A♯	A♯3, C×4, E4, F♯4	6/5	8	110 mm
Second inversion: F♯aug7/C×	C×	C×4, E4, F♯4, A♯4	4/3	8	110 mm
Third inversion: F♯aug7/E	E	E4, F♯4, A♯4, C×5	4/2	10	138 mm

One position per chord tone in the bass. Spans are for close position: voiced inversions appear under Voicings.

Change one note

Chords a single note away, and what moving that note does.

Chord	Change	Formula	Common tones
F♯aug	drops E	1 3 ♯5	3
F♯7	C× becomes C♯	1 3 5 ♭7	3
F♯9	C× becomes C♯, G♯	1 3 5 ♭7 9	3
F♯	C×, E becomes C♯	1 3 5	2
F♯maj7	C×, E becomes C♯, E♯	1 3 5 7	2
F♯m7	A♯, C× becomes A, C♯	1 ♭3 5 ♭7	2
F♯m7♭5	A♯, C× becomes A, C	1 ♭3 ♭5 ♭7	2
F♯7sus4	A♯, C× becomes B, C♯	1 4 5 ♭7	2
F♯6	C×, E becomes C♯, D♯	1 3 5 6	2
F♯add9	C×, E becomes C♯, G♯	1 3 5 9	2

Frequencies

Note	MIDI	Frequency
F♯3	54	185.00 Hz
A♯3	58	233.08 Hz
C×4	62	293.66 Hz
E4	64	329.63 Hz

Reference pitch A440, 12-TET, close root position.

Set theory: prime form, Forte number, interval vector

Absolute pitch class set: {6, 10, 2, 4}
Normal order: [2, 4, 6, 10]
Prime form: (0248)
Forte number: 4-24
Interval vector: <020301>

Pair	Interval	Semitones	Interval class
F♯ to A♯	Major third	4	4
F♯ to C×	Minor sixth	8	4
F♯ to E	Minor seventh	10	2
A♯ to C×	Major third	4	4
A♯ to E	Tritone	6	6
C× to E	Major second	2	2

Where these facts come from

Every value on this page is derived from the note formula for a augmented 7th applied to the root F♯, using standard music theory. Nothing here is hand-entered per chord, so the notes, intervals, inversions and frequencies cannot drift out of agreement with each other. Pitches assume 12-TET at A440.

F♯ Augmented 7th

Fingerings

F♯ Augmented 7th: notes and degrees