An interval is the distance (in semitones) between two notes.
| Half Steps | Whole Steps | Common Name | Symbol |
|---|---|---|---|
| 0 | 0.0 | Perfect Unison | PU |
| 1 | 0.5 | Minor Second | m2 |
| 2 | 1.0 | Major Second | M2 |
| 3 | 1.5 | Minor Third | m3 |
| 4 | 2.0 | Major Third | M3 |
| 5 | 2.5 | Perfect Forth | P4 |
| 6 | 3.0 | Augmented Forth | A4 |
| 6 | 3.0 | Diminished Fifth | D5 |
| 7 | 3.5 | Perfect Fifth | P5 |
| 8 | 4.0 | Augmented Fifth | A5 |
| 8 | 4.0 | Minor Sixth | m6 |
| 9 | 4.5 | Major Sixth | M6 |
| 10 | 5.0 | Augmented Sixth | A6 |
| 10 | 5.0 | Minor Seventh | m7 |
| 11 | 5.5 | Major Seventh | M7 |
| 12 | 6.0 | Perfect Octave | P8 |
| 13 | 6.5 | Minor Ninth | m9 |
| 14 | 7.0 | Major Ninth | M9 |
| 15 | 7.5 | Minor Tenth | m10 |
| 16 | 8.0 | Major Tenth | M10 |