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🎼 Key Signature Calculator

Show the sharps and flats for each major and minor key signature.

Understanding Key Signatures

A key signature indicates which notes are sharp or flat throughout a piece of music. The order of sharps follows the circle of fifths: F#, C#, G#, D#, A#, E#, B#. The order of flats is the reverse: Bb, Eb, Ab, Db, Gb, Cb, Fb.

Each major key shares its key signature with a relative minor key located a minor third below. For example, C Major and A Minor both have no sharps or flats.

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