In music theory, B ♭ major is a major scale based on B ♭, with pitches B ♭, C, D, E ♭, F, G, and A. Its key signature has two flats. Its relative minor is G minor, and its parallel minor is B ♭ minor (not used enharmonically as A ♯ minor). A ♯ major, its enharmonic, has three double - sharps, which makes it impractical to use.
what is the key signature for b flat major
has two flats