| 100% | FMINOR | 6 | Key of Chopin's "Piano Concerto No. 2" |
| 100% | FMINOR | 6 | Key of Chopin's Piano Concerto No. 2 |
| 83% | AMAJ | 4 | Key of Liszt's Piano Concerto No. 2 |
| 70% | DFLAT | 5 | Key of Prokofiev's Piano Concerto No. 1 |
| 70% | BFLATMINOR | 10 | Key of Tchaikovsky's Piano Concerto No. 1 |
| 70% | GMAJOR | 6 | Key of Beethoven's Piano Concerto No. 4 |
| 70% | CMINOR | 6 | Key of Mozart's Piano Concerto No. 24 |
| 57% | AFLAT | 5 | Key of Chopin's Polonaise No. 6 |
| 57% | GMINOR | 6 | Key of Chopin's Ballade No. 1 |
| 56% | EMAJ | 4 | Key of Chopin's Étude Op. 10, No. 3 |
| 55% | AFLAT | 5 | Most common key of Chopin's piano pieces |
| 53% | DFLAT | 5 | Key of Prokofiev's first piano concerto |
| 53% | BFLAT | 5 | Key of Mozart's last piano concerto |
| 53% | BFLAT | 5 | Key of Beethoven's Second Piano Concerto |
| 53% | AMINOR | 6 | Key of Grieg's only piano concerto |
| 53% | DMAJ | 4 | Key of Beethoven's Symphony No. 2 |
| 52% | AMIN | 4 | Key of Grieg's only piano concerto: Abbr. |
| 51% | FMAJ | 4 | Key of Brahms's Symphony No. 3: 2 wds. |
| 51% | FMAJ | 4 | Key of Mozart's Symphony No. 6: 2 wds. |
| 49% | DMINOR | 6 | Key of Brahms' First Piano Concerto |
| 48% | DMAJ | 4 | Key of Brahms' Symphony No. 2 |
| 47% | AMINOR | 6 | Key of Ralph Vaughan Williams's String Quartet No. 2 |
| 46% | GFLAT | 5 | Key of Chopin's "Butterfly" Étude |
| 46% | DFLAT | 5 | Key of Chopin's "Minute Waltz" |
| 46% | EMAJOR | 6 | Key of Chopin's etude "Tristesse" |
| 46% | EMAJOR | 6 | Key of Chopin's étude "Tristesse" |
| 46% | AFLAT | 5 | Key of Chopin's "Polonaise-Fantaisie" |
| 46% | AMINOR | 6 | Key of Chopin's "Winter Wind" |
| 46% | AMINOR | 6 | Key of Chopin’s “Winter Wind” |
| 46% | BRIEF | 5 | "___ Encounter," 1945 drama film that features Sergei Rachmaninoff's "Piano Concerto No. 2" |