Note reference
F-sharp Note (F#)
The F♯ note is pitch class 6. On piano, play the highlighted key; on guitar, use any highlighted fret position. In standard pitch notation, F♯4 is 369.99 Hz when A4 is tuned to 440 Hz.
F♯ on piano
Find the highlighted key and then move left or right by complete groups of 12 keys to locate the same note name in other octaves.
F♯ on sheet music
The vertical staff position follows the letter name. A sharp or flat changes the pitch without changing the line or space assigned to that letter.
F♯ on guitar
In standard tuning, the diagram shows open-string and fretted locations from fret 0 through fret 12. Learn two or three nearby positions first, then connect the full pattern.
Why the note is spelled F♯
F♯ is the black key immediately above F. G♭ uses the same piano key in equal temperament, but the correct name depends on the key, scale, and harmonic direction.
This spelling appears in G major, D major, A major, E major, B major, F♯ major, and their relative minors. In chord and scale notation, keeping each scale degree on the expected letter makes intervals easier to read.
F♯ frequencies by octave
The table uses twelve-tone equal temperament with A4 = 440 Hz. Other concert-pitch standards shift every value slightly.
| Scientific pitch | MIDI note | Frequency |
|---|---|---|
| F♯1 | 30 | 46.25 Hz |
| F♯2 | 42 | 92.50 Hz |
| F♯3 | 54 | 185.00 Hz |
| F♯4 | 66 | 369.99 Hz |
| F♯5 | 78 | 739.99 Hz |
| F♯6 | 90 | 1479.98 Hz |
| F♯7 | 102 | 2959.96 Hz |
Frequently asked questions
Where is F♯ on the piano?
Use the highlighted key in the keyboard diagram. The same key repeats every 12 semitones, so every octave has another F♯.
Where is F♯ on guitar?
The fretboard diagram marks every occurrence through fret 12 in standard tuning E–A–D–G–B–E. The pattern repeats after the 12th fret.
How is F♯ written on sheet music?
The staff diagram shows F♯4 in treble clef and F♯3 in bass clef. Add the accidental before the notehead when the key signature does not already supply it.
What frequency is F♯?
Frequency depends on octave. With A4 = 440 Hz, F♯4 is 369.99 Hz; each higher octave doubles the frequency.
Is F♯ the same as G♭?
They are enharmonic equivalents in equal temperament, so they have the same pitch on a piano. The written name changes according to the key and harmonic role.