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Art & music · Grades 9–12

Naming intervals

Study guide for Grades 9 to 12: 2 worked examples and 2 practice questions. Count letter names, including both ends, to get the number (third, fifth...).

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Rule and key idea

Count letter names, including both ends, to get the number (third, fifth...). Then count semitones to find the quality (major, minor, perfect, augmented, diminished).

size = letter names counted · quality = semitones

Worked examples

What is the interval from B up to G?

6 letter names and 8 semitones: minor sixth.

minor sixth

What is the interval from F up to B?

4 letter names and 6 semitones: augmented fourth.

augmented fourth

Try two questions

  1. What is the interval from C up to G?

    1. perfect fifth
    2. minor seventh
    3. augmented fourth
    4. diminished fifth

  2. What is the interval from D up to B?

    1. perfect fifth
    2. minor second
    3. major sixth
    4. minor sixth

Answers and reasoning

Answers and marking notes
  1. perfect fifth

    5 letter names and 7 semitones: perfect fifth.

  2. major sixth

    6 letter names and 9 semitones: major sixth.

How this page was made: written for StudyBrix with AI assistance from our own templates. Answers and worked examples are checked by automated tests, and grade bands are approximate, not an official curriculum alignment. See the editorial policy for corrections. Editorial policy