F# is a major, spelled F#, A# and C#. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is x664, which sits at fret 4, spans 2 frets and mutes 1 string. 12 positions for it are shown below, from the nut up to fret 13.
Notes and intervals
Note
F#
A#
C#
Interval
1P
3M
5P
12 ways to play it
Ordered by how hard they are to fret, easiest first, one per position on the neck. Fret numbers are relative to the position marked beside each grid.
x664sits at fret 4, spans 2 frets and mutes 1 stringx121sits at fret 1, needs a barre across 3 strings at fret 1 and mutes 1 string666xsits at fret 6, needs a barre across 3 strings at fret 6 and mutes 1 string111099sits at fret 9 and needs a barre across 2 strings at fret 93664sits at fret 3 and spans 3 frets11131413sits at fret 11 and spans 3 frets3624sits at fret 2 and spans 4 fretsx131413sits at fret 13, needs a barre across 3 strings at fret 13 and mutes 1 string11101413sits at fret 10 and spans 4 frets3121sits at fret 1 and needs a barre across 3 strings at fret 1312xsits at fret 1, spans 2 frets and mutes 1 string6664sits at fret 4 and spans 2 frets
Keys F# belongs to
F# is diatonic to 24 of the 96 keys this app knows, playing a different role in each.