Order of Flats
Finding the key signature in treble clef.
Finding the key signature in bass clef.
A lowercase b represents the flat symbol.
1 Flat (Bb) - F Major - D Minor
2 Flats (Bb, Eb) - Bb Major - G Minor
3 Flats (Bb, Eb, Ab) - Eb Major - C Minor
4 Flats (Bb, Eb, Ab, Db) - Ab Major - F Minor
5 Flats (Bb, Eb, Ab, Db, Gb) - Db Major - Bb Minor
6 Flats (Bb, Eb, Ab, Db, Gb, Cb) - Gb Major - Eb Minor
7 Flats (Bb, Eb, Ab, Db, Gb, Cb, Fb) - Cb Major - Ab Minor