Information about the perfect octave interval

Name

This interval is called: Perfect octave

Abbreviation

You can use the somewhat shorter name "P8" to indicate a Perfect octave.

Construct

How to build a perfect octave interval?

To construct an interval correctly you must always use two steps.

  1. Count the amount of naturals used
  2. Count the steps between de two notes

At first, and with easy intervals, this may seem unnecessary, but when advancing to more dificult intervals and musical keys they will become more mandatory.

The following example is for a perfect octave from C3. Outcome: C4

1.
A Perfect octave uses 8 naturals.
Example: C3 D3 E3 F3 G3 A3 B3 C4
2.
A Perfect octave has 12 semitones between the notes.
Example: C3 C#3 D3 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4

Cheatsheet

Tranposed for each note

You can use the following cheatsheet to check the Perfect octave for each root note.
Cb3 ↠ Cb4
C3 ↠ C4
C3 ↠ C4
C3 ↠ C4
C#3 ↠ C#4
C3 ↠ C4
Db3 ↠ Db4
D3 ↠ D4
D3 ↠ D4
D3 ↠ D4
D#3 ↠ D#4
D3 ↠ D4
Eb3 ↠ Eb4
E3 ↠ E4
E3 ↠ E4
E3 ↠ E4
E#3 ↠ E#4
E3 ↠ E4
Fb3 ↠ Fb4
F3 ↠ F4
F3 ↠ F4
F3 ↠ F4
F#3 ↠ F#4
F3 ↠ F4
Gb3 ↠ Gb4
G3 ↠ G4
G3 ↠ G4
G3 ↠ G4
G#3 ↠ G#4
G3 ↠ G4
Ab3 ↠ Ab4
A3 ↠ A4
A3 ↠ A4
A3 ↠ A4
A#3 ↠ A#4
A3 ↠ A4
Bb3 ↠ Bb4
B3 ↠ B4
B3 ↠ B4
B3 ↠ B4
B#3 ↠ B#4
B3 ↠ B4