# F-sharp major
**F-sharp major** is a major key and scale with the tonic (first note) F♯ and a key signature of six sharps: F♯, C♯, G♯, D♯, A♯, and E♯. Its scale consists of the pitches F♯, G♯, A♯, B, C♯, D♯, and E♯.[1](https://theorypractice.app/learn/key-signature/f-sharp-major) • [2](https://www.circlefifth.com/key/f-sharp-major) For pianists it is one of the "black note" keys: the scale contains only two white notes, B and E♯, the latter sounding as F natural.[3](https://crosseyedpianist.com/2023/08/21/f-sharp-major/)
| Key fact | Detail |
|---|---|
| Key signature | Six sharps, F♯, C♯, G♯, D♯, A♯, E♯, the first six entries of the fixed order of sharps F♯–C♯–G♯–D♯–A♯–E♯–B♯[1](https://theorypractice.app/learn/key-signature/f-sharp-major) • [4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/) |
| Scale | F♯–G♯–A♯–B–C♯–D♯–E♯, one letter name per degree[2](https://www.circlefifth.com/key/f-sharp-major) |
| Relative minor | D♯ minor, sharing the same six-sharp signature[5](https://piano.org/theory/relative-keys/) |
| Enharmonic equivalent | G♭ major, six flats; the two keys sound the same on instruments in equal temperament but are spelled differently[4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/) • [6](https://www.zambiancu.org/1zRead/SchmidtJones1-music--pitch-and-major-scales-and-keys-1.10.pdf) |
| Circle-of-fifths neighbors | B major (five sharps) on the flat side, C♯ major (seven sharps) on the sharp side[1](https://theorypractice.app/learn/key-signature/f-sharp-major) |
| Identifying signature | The last sharp, E♯, is the leading tone; a semitone above it is the tonic F♯[1](https://theorypractice.app/learn/key-signature/f-sharp-major) |
## Key signature and scale
Every sharp key signature draws from the same fixed sequence, F♯–C♯–G♯–D♯–A♯–E♯–B♯, adding one sharp per step around the circle of fifths. The signature of F♯ major is simply the first six entries of that sequence.[4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/) • [1](https://theorypractice.app/learn/key-signature/f-sharp-major) To name a sharp key at sight, a reader looks at the last sharp of the signature, here E♯: the major tonic sits one semitone above it, so E♯ plus a semitone gives F♯.[1](https://theorypractice.app/learn/key-signature/f-sharp-major)
Each sharp in the signature is global: it applies to that letter name in every octave of the staff, not just the written position.[4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/) The scale as written, F♯–G♯–A♯–B–C♯–D♯–E♯, uses each letter name once. This is why the seventh degree is spelled E♯ rather than F: the letter F is already taken by the tonic, and calling the seventh note F would put two notes on the same line of the staff and leave the E position empty.[7](https://rulesofthumb.info/rule/a-scale-uses-each-letter-once)
## Place on the circle of fifths
Moving clockwise around the circle of fifths, each key ascends a fifth and adds a sharp. F♯ major sits between [B major](https://www.edgepedia.org/b-major), which has five sharps, and C♯ major, which has seven; neighboring keys share every note but one, which is why modulation to the dominant or subdominant side sounds smooth.[1](https://theorypractice.app/learn/key-signature/f-sharp-major) Going one step beyond C♯ major would give G♯ major, which does not exist as a usable key signature because it would require double sharps; instead the next key is A♭ major, the enharmonic equivalent.[4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/)
## Enharmonic equivalence with G-flat major
F♯ major is enharmonically equivalent to **G-flat major**, which has six flats: B♭, E♭, A♭, D♭, G♭, and C♭. The two spellings produce scales that sound exactly the same on any instrument in equal temperament, although they are written completely differently.[4](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/) • [6](https://www.zambiancu.org/1zRead/SchmidtJones1-music--pitch-and-major-scales-and-keys-1.10.pdf) In G♭ major the note F is natural, since the flat signature alters only B, E, A, D, G, and C; the same key answers differently under its two names, F being F♯ in F♯ major and F natural in G♭ major.[8](https://musescore.com/tools/accidental-calculator/g-flat-major-f)
The choice between the two spellings is a notational decision with practical consequences. In writing for transposing instruments in B♭ or E♭, such as clarinets and trumpets, a G♭ key signature is preferable to an F♯ signature, because a sharp-side key would generate double sharps in the transposed parts.[9](https://levantado.ddns.net/ipfs/QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco/wiki/F_sharp_major.html) The relative-minor side matters too: F♯ major pairs with D♯ minor, while G♭ major's relative is E♭ minor, so a composer planning minor-key passages may pick the spelling whose relative minor avoids double sharps or double flats.[5](https://piano.org/theory/relative-keys/)
## Chords and harmonic layout
Stacking thirds on each degree of the scale gives the seven diatonic triads of the key.[2](https://www.circlefifth.com/key/f-sharp-major) The tonic (I) is F♯ major, the supertonic (ii) is G♯ minor, the mediant (iii) is A♯ minor, the subdominant (IV) is B major, the dominant (V) is C♯ major, and the submediant (vi) is D♯ minor.[10](https://piano.samesound.ru/en/reference/keys/piano/fs/major) [Scale degrees](https://www.edgepedia.org/degree-music) carry both numbers and technical names, so a theory exercise may ask for the submediant of F♯ major rather than the sixth note.[1](https://theorypractice.app/learn/key-signature/f-sharp-major)
## Repertoire and character
Despite its formidable signature, F♯ major has a place in the piano and orchestral literature. Beethoven's Piano Sonata Op. 78, Chopin's Impromptu Op. 36 and Barcarolle Op. 60, Verdi's "Va pensiero" from *Nabucco*, a duet from Puccini's *La Bohème*, and Mahler's Tenth Symphony all use the key.[11](https://rodoni.ch/TESTI-PER-PORTALE/The-Piano-Book.pdf) The opening movement of Ravel's *Sonatine* and Debussy's *Poissons d'or* are also in F♯ major.[3](https://crosseyedpianist.com/2023/08/21/f-sharp-major/) A survey of the Mutopia Project's catalog of 1,974 scores with a readable key found 14 in F♯ major, 0.7 percent and 18th of the 24 keys counted.[12](https://musictheoryprint.com/keys/f-sharp-major)
The scale's two white notes leave most of the hand on black keys, and writers on piano repertoire describe the writing as technically demanding yet luminous and colorful in sound.[3](https://crosseyedpianist.com/2023/08/21/f-sharp-major/) Nineteenth-century key-character writings ascribed a split personality to the enharmonic pair: for the theorist Ebenezer Pauer, F♯ major "sounds brilliant and exceedingly clear," while the same key spelled G♭ major "expresses softness coupled with richness."[13](https://interlude.hk/feel-key-f-sharp-major-g-flat-major/)
## References
1. [F♯ Major Key Signature — Sharps, Flats & Scale, Theory Practice](https://theorypractice.app/learn/key-signature/f-sharp-major)
2. [F# Major: Key Signature, Scale & Chords, Circle of Fifths](https://www.circlefifth.com/key/f-sharp-major)
3. [In the Key of F-sharp Major, The Cross-Eyed Pianist](https://crosseyedpianist.com/2023/08/21/f-sharp-major/)
4. [Major Scales and Keys – Steps to Music Theory, Texas A&M University Libraries](https://odp.library.tamu.edu/stepstomusictheory/chapter/major-scales-keys/)
5. [Relative Major and Minor Keys on Piano, piano.org](https://piano.org/theory/relative-keys/)
6. [Music, Pitch and Major Scales and Keys (Schmidt-Jones), open textbook PDF](https://www.zambiancu.org/1zRead/SchmidtJones1-music--pitch-and-major-scales-and-keys-1.10.pdf)
7. [Why does F sharp major contain an E sharp? Rules of Thumb](https://rulesofthumb.info/rule/a-scale-uses-each-letter-once)
8. [Is F sharp or flat in G♭ major? MuseScore accidental calculator](https://musescore.com/tools/accidental-calculator/g-flat-major-f)
9. [F-sharp major (encyclopedia copy, IPFS mirror)](https://levantado.ddns.net/ipfs/QmXoypizjW3WknFiJnKLwHCnL72vedxjQkDDP1mXWo6uco/wiki/F_sharp_major.html)
10. [F# major key on piano, SAMESOUND Piano Handbook](https://piano.samesound.ru/en/reference/keys/piano/fs/major)
11. [The Piano Book (PDF, pieces in F-sharp major)](https://rodoni.ch/TESTI-PER-PORTALE/The-Piano-Book.pdf)
12. [F-sharp Major Scale, Key Signature and Chords, musictheoryprint.com](https://musictheoryprint.com/keys/f-sharp-major)
13. [How You Should Feel in the Key of F Sharp Major / G flat major, Interlude](https://interlude.hk/feel-key-f-sharp-major-g-flat-major/)
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*Topic: Encyclopedia › Arts and culture › Music › Musical practice and theory › Instruments, theory, and world traditions › Pitch, tuning, scales, and musical acoustics*
*Initially written Sep 17, 2026 · Reviewed: Sep 20, 2026; Sep 30, 2026; Oct 25, 2026 · Edited: Sep 20, 2026; Sep 30, 2026; Oct 15, 2026; Oct 25, 2026 · Last review: Oct 25, 2026*
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