Flats (b)
| Major key | Number of flaths | Flat notes | Minor key |
|---|---|---|---|
| C major | 0 | A minor | |
| F major | 1 | Bb | D minor |
| Bb major | 2 | Bb, Eb | G minor |
| Eb major | 3 | Bb, Eb, Ab | C minor |
| Ab major | 4 | Bb, Eb, Ab, Db | F minor |
| Db major | 5 | Bb, Eb, Ab, Db, Gb | Bb minor |
| Gb major | 6 | Bb, Eb, Ab, Db, Gb, Cb | Eb minor |
| Cb major | 7 | Bb, Eb, Ab, Db, Gb, Cb, Fb | Ab minor |
Sharps (#)
| Major key | Number of sharps | Sharp notes | Minor key |
|---|---|---|---|
| C major | 0 | A minor | |
| G major | 1 | F# | E minor |
| D major | 2 | F#, C# | B minor |
| A major | 3 | F#, C#, G# | F# minor |
| E major | 4 | F#, C#, G#, D# | C# minor |
| B major | 5 | F#, C#, G#, D#, A# | G# minor |
| F# major | 6 | F#, C#, G#, D#, A#, E# | D# minor |
| C# major | 7 | F#, C#, G#, D#, A#, E#, B# | A# minor |