| BOOK I | BOOK II | |||
|---|---|---|---|---|
| key | prelude | fugue | prelude | fugue |
| c major | 〇 | 〇 | ||
| c minor | 〇 | ～ | 〇 | |
| c# major | ||||
| c# minor | 〇 | 〇 | ||
| d major | ～ | |||
| d minor | ||||
| e♭ major | ||||
| e♭/d# minor | ～ | ～ | ||
| e major | 〇 | |||
| e minor | ||||
| f major | ||||
| f minor | 〇 | |||
| f# major | ||||
| f# minor | ～ | ～ | ||
| g major | ||||
| g minor | ||||
| a♭ major | ||||
| g# minor | ||||
| a major | ||||
| a minor | 〇 | |||
| b♭ major | ||||
| b♭ minor | ||||
| b major | 〇 | ～ | ||
| b minor | 〇 | 〇 | ||