C major / a minor – No Sharps or Flats

G major / e minor – F sharp
D major / b minor – F sharp, C sharp
A major / f sharp minor – F sharp, C sharp, G sharp
E major / c sharp minor – F sharp, C sharp, G sharp, D sharp
B major / g sharp minor – F sharp, C sharp, G sharp, D sharp, A sharp
F sharp major / d sharp minor – F sharp, C sharp, G sharp, D sharp, A sharp, E sharp
C sharp major / a sharp minor – F sharp, C sharp, G sharp, D sharp, A sharp, E sharp, B sharp

F major / d minor – B flat
B flat Major / g minor – B flat, E flat
E flat Major / c minor – B flat, E flat, A flat
A flat Major / f minor – B flat, E flat, A flat, D flat
D flat Major / b flat minor – B flat, E flat, A flat, D flat, G flat
G flat Major / e flat minor – B flat, E flat, A flat, D flat, G flat, C flat
C flat Major / a flat minor – B flat, E flat, A flat, D flat, G flat, C flat, F flat

This post via the Beginners Piano blog where you can get information on how to play the piano or keyboards for beginners.

Key Signatures Chart To Learn Piano

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