Music Theory: Intervals

An Interval in music refers to the distance between any two notes. The types of Intervals are, Unison, Perfect, Major, Minor, Augmented and Diminished. Intervals are used in both Chords and Melody. In Chords, Intervals are the distance between each Chord tone. In Melody, Intervals are the distance (scale steps) from one note in the Melody to the next.

When an Interval is Major or Perfect and is raised by one Half Step, it is called Augmented. Any Major Interval that is lowered one Half Step is Minor. A Perfect Interval lowered by one Half Step is Diminished.

This chart shows Intervals up to the 15th scale degree. The name of each Interval appears in the list that follows this chart, and corresponds with the number displayed under each Interval.


  1. Perfect Unison
  2. Minor 2nd
  3. Major 2nd
  4. Augmented 2nd
  5. Minor 3rd
  6. Major 3rd
  7. Augmented 3rd
  8. Diminished 4th
  9. Perfect 4th
  10. Augmented 4th
  11. Diminished 5th
  12. Perfect 5th
  13. Augmented 5th
  14. Minor 6th
  15. Major 6th
  16. Augmented 6th
  17. Minor 7th
  18. Major 7th
  19. Augmented 7th
  20. Diminished Octave
  21. Perfect Octave
  22. Augmented Octave
  23. Minor 9th
  24. Major 9th
  25. Augmented 9th
  26. Minor 10th
  27. Major 10th
  28. Augmented 10th
  29. Diminished 11th
  30. Perfect 11th
  31. Augmented 11th
  32. Diminished 12th
  33. Perfect 12th
  34. Augmented 12th
  35. Minor 13th
  36. Major 13th
  37. Augmented 13th
  38. Minor 14th
  39. Major 14th
  40. Augmented 14th
  41. Diminished 15th
  42. Perfect 15th
  43. Augmented 15th