B is a major, spelled B, D# and F#. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is 4322, which sits at fret 2 and needs a barre across 2 strings at fret 2. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
B
D#
F#
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.
4322sits at fret 2 and needs a barre across 2 strings at fret 24676sits at fret 4 and spans 3 fretsx11119sits at fret 9, spans 2 frets and mutes 1 stringx676sits at fret 6, needs a barre across 3 strings at fret 6 and mutes 1 string111111xsits at fret 11, needs a barre across 3 strings at fret 11 and mutes 1 string4376sits at fret 3 and spans 4 frets811119sits at fret 8 and spans 3 fretsx151414sits at fret 14, needs a barre across 2 strings at fret 14 and mutes 1 string81179sits at fret 7 and spans 4 frets432xsits at fret 2, spans 2 frets and mutes 1 stringx322sits at fret 2, needs a barre across 2 strings at fret 2 and mutes 1 string8676sits at fret 6 and needs a barre across 3 strings at fret 6
Keys B belongs to
B is diatonic to 24 of the 96 keys this app knows, playing a different role in each.