Bmaj7 is a major seventh, spelled B, D#, F# and A#. In Ukulele (low G) tuning (G3 C4 E4 A4) the easiest shape is 4666, which sits at fret 4 and spans 2 frets. 12 positions for it are shown below, from the nut up to fret 14.
Notes and intervals
Note
B
D#
F#
A#
Interval
1P
3M
5P
7M
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.
4666sits at fret 4 and spans 2 frets4321sits at fret 1 and spans 3 frets3322sits at fret 2 and needs a barre across 2 strings at fret 24366sits at fret 3 and spans 3 fretsx111113sits at fret 11, needs a barre across 2 strings at fret 11 and mutes 1 string81079sits at fret 7 and spans 3 frets15151414sits at fret 14 and needs a barre across 2 strings at fret 1481076sits at fret 6 and spans 4 frets11101114sits at fret 10 and spans 4 frets436xsits at fret 3, spans 3 frets and mutes 1 string4362sits at fret 2 and spans 4 frets11111113sits at fret 11 and needs a barre across 3 strings at fret 11
Keys Bmaj7 belongs to
Bmaj7 is diatonic to 16 of the 96 keys this app knows, playing a different role in each.