Reviewed 22 July 2026 · Music Theory Print editorial
The circle is a reading route, not a diagram to memorize blindly.
Moving clockwise adds one sharp and rises by perfect fifth. Moving counter-clockwise adds one flat and falls by perfect fifth. The order of sharps is F–C–G–D–A–E–B; the order of flats reverses it.
Sharp keys
Read the final sharp, then move up one letter name to find the major key.
Flat keys
The penultimate flat names the major key, except F major with one flat.
Relative minor
Move down three semitones from the major tonic; the signature stays the same.
Worked example: three sharps
F-sharp, C-sharp, G-sharp. The last sharp is G-sharp; one letter step above is A, so the major key is A major. Its relative minor is F-sharp minor.
Use the canonical print owner
The complete signature drills remain in the existing Key Signatures hierarchy, so this article explains the concept without duplicating its worksheets.
Open key-signature worksheets