The Circle of Fifths Explained: Tonic, Dominant and Subdominant
The circle of fifths is a tool for harmony. All major chords sit on the outside of the circle. All minor chords sit on the inside. And chords next to each other are close relatives.
Tonic, dominant, subdominant
- Tonic. The “home” chord of a song. When you look at a song, it is usually the chord it starts and ends on. When you write your own, you can pick any chord as the tonic, and build from there. 🏠
- Dominant. One step clockwise from the tonic on the circle (a fifth above). Its job is to build tension that wants to go back home to the tonic. That is why the dominant is always major, even in a minor key.
- Subdominant. One step counterclockwise from the tonic (a fourth above, or a fifth below).
What it is useful for
You will use it for two things again and again. First, to find which chords belong together in a key. That helps both when you write a chord progression and when you improvise over one. Second, to find the sharps or flats of a key when you read music.
Why is it called a fifth?
“Quint” is Latin for five. The step spans five natural notes. From C up to G, you count C, D, E, F, G. The same step is at the center of how a basic chord is built. A chord is a root, a third and a fifth. And only the third changes between the major and the minor version.
Frequently asked questions
Why is the dominant chord always major?
Even in a minor key, the dominant chord is major. Its major third is exactly what pulls the music back home to the tonic. Play it as minor, and that pull gets much weaker.
What is the circle of fifths useful for?
Two big things. It shows which chords belong together in a key, which helps when you write or improvise. And it tells you the sharps or flats of a key, when you read music.
Where does the name "fifth" come from?
Count the natural notes from a root up to the next note on the circle. For example C, D, E, F, G. That is five steps, a fifth. The fifth is also central to how chords are built. A basic chord is a root, a third and a fifth.