minor key signatures — handy guide Theory Things   William Wieland
sharps:3
#
4
#
5
#
6
#
012
 f  c  g  d  a  e  b 
flats:43210b
6
b
5
Explanation
Write the order of sharps. Eventually, this is all you will need.
        f  c  g  d  a  e  b 
A minor has zero sharps. E minor has 1 sharp. B minor has 2.
sharps:012
 f  c  g  d  a  e  b 
Continue counting on the other end, but add a # to each letter.
F# minor has 3 sharps. C# minor has 4, G# mi 5, and D# mi 6.
sharps:3
#
4
#
5
#
6
#
012
 f  c  g  d  a  e  b 
The order of flats is the order of sharps backwards. Number flats backwards.
A minor has zero flats. Dmi has 1 flat, Gmi 2, Cmi 3, and Fmi 4.
sharps:3
#
4
#
5
#
6
#
012
 f  c  g  d  a  e  b 
flats:43210
Continue counting on the other end, but add a b to each letter.
B flat minor has 5 flats. E flat minor has 6.
sharps:3
#
4
#
5
#
6
#
012
 f  c  g  d  a  e  b 
flats:43210b
6
b
5