This article is written by Toru Hoshino, a jazz bassist and instructor based in Japan who teaches online lessons to students worldwide. In this article, he shares an easier way to remember the 3rd and 5th chord tones — by their visual shape on the fretboard, rather than by counting.
When it comes to memorizing chord tones like the 3rd and 5th on bass, a lot of players end up thinking something like: “Okay, the 5th of D is… counting up five notes from D… D, E, F♯, G, A… wait, did A have a sharp on it or not?”
Rather than working it out in your head like that every single time, it’s much easier to learn the shape these intervals make on the fretboard relative to the root. This article is for:
✅️ Anyone just starting to learn bass theory
✅️ Anyone who’s heard of the 3rd and 5th but isn’t sure what to actually do with them
Let’s start with the 5th, since it’s the easier of the two to learn.
Contents
The Root-to-5th Relationship
Here’s the position of C and its 5th, G:
And D and its 5th, A:
And F and its 5th, C:
Notice the pattern: relative to the root, the 5th is consistently either two strings over (toward the thinner strings) and two frets up, or the same fret on the neighboring thicker string.
Unfortunately, there’s no shortcut for memorizing the handful of irregular fretboard spots shown above — but learning to see the 5th this way, as a consistent shape, makes building a bass line noticeably easier.
The Root-to-3rd Relationship
The 3rd comes in two flavors: a major 3rd and a minor 3rd.
About the Major 3rd
For a C chord, you can use the major 3rd whenever you see something like “6,” “7,” or “△7” written to the right of the letter C.
About the Minor 3rd
For a C chord, you can use the minor 3rd whenever you see something like “m7,” “m6,” “m7♭5,” or “dim” written to the right of the letter C.
Root-to-Major-3rd Shape
C and its major 3rd:
D and its major 3rd:
F and its major 3rd:
Seeing the major 3rd this way, as a consistent shape relative to the root, makes it much easier to remember:
Root-to-Minor-3rd Shape
C and its minor 3rd:
D and its minor 3rd:
F and its minor 3rd:
Same idea — seeing the minor 3rd as a consistent shape relative to the root makes it much easier to recall on the fly:
As with the 5th, there’s unfortunately no shortcut for the irregular spots — but being able to instantly picture where the root, major 3rd, and minor 3rd sit relative to each other on the fretboard makes building a bass line considerably easier.
Recognizing these shapes by sight is one thing — actually hearing whether you’re reaching for the right one in real time, under tempo, is exactly what a teacher’s ear can confirm.
Want Personalized Feedback on Your Playing?
This is exactly the kind of thing that’s hard to fix alone — and where having a teacher makes all the difference.
At Line on Bass, I offer an online lesson service where you send me a video of your playing, and I give you specific, detailed feedback — every single day if you want.
Students from around the world are using this to fix exactly these kinds of issues and steadily improve their jazz bass skills.