The A Minor scale (more precisely, the A Natural Minor scale) is the first minor scale most pianists learn, and it is the relative minor of C Major. Its notes — A, B, C, D, E, F, G, and A — sit on the seven white keys of the piano, just like C Major. The only difference is where you start and stop: A Minor begins on A, follows the minor pattern (W-H-W-W-H-W-W), and lands back on A. That single change of "home note" is what gives the scale its darker, more reflective character.
Because A Minor and C Major share every note, they are called relative keys — they sound completely different but use identical note material. A Minor's parallel major is A Major (same root, opposite mode). The diatonic chords in A Minor — Am, B°, C, Dm, Em, F, G — show up in everything from Bach to Adele. The classic minor progression i–VI–III–VII (Am → F → C → G) is the backbone of countless pop, rock, and ballad songs, including "Stairway to Heaven" and "Hotel California".
A Minor has two close cousins worth knowing about: A Harmonic Minor raises the seventh note (G → G♯) to create a stronger pull back to A, and A Melodic Minor raises both the sixth and seventh ascending. The "natural" version on this page is the unaltered scale and the most common starting point for understanding minor tonality.
