Ever feel like you’re playing the same three blues chords in the same positions forever? I get it. But here’s the good news: once you understand how dominant 7th chords work and how to move them around the fretboard, you’ll unlock twelve new chords without memorizing anything new. You’re just transposing what you already know.
That’s what we’re covering today. I’m going to show you how one simple E7 chord shape becomes every dominant 7th chord you’ll ever need for blues. No theory overload—just practical stuff that’ll get you playing better blues right away.
📘 Blues Chord Mastery Series – Part 1 of 3
Why Dominant 7th Chords Matter for Blues
Dominant 7th chords are the backbone of blues. You’ve probably heard them called E7, A7, B7—or sometimes “E dominant 7,” which is just the classical term. These aren’t major 7ths or minor 7ths. They’re blues chords, plain and simple.
The trick most guitarists miss is that you don’t have to memorize each chord individually. If you understand root notes and how to transpose chord shapes, you can play any dominant 7th chord anywhere on the neck. That’s what separates players who know a few chord shapes from players who really understand the fretboard.
Understanding Root Notes
Before we get into moving chords around, you need to understand root notes. The root note is the lowest note in the chord. It’s the foundation—like the cement foundation under a house. You don’t build the frame first. You dig a hole, pour gravel, then pour cement. The root note is that foundation for your chord.
When we talk about an E7 chord, that E is the root. When you move that chord shape up the fretboard, whatever note ends up under your root finger becomes the new chord name. That’s how transposing works.
Learn the Notes on Your Low E String
To make this work, you need to know the notes on your sixth string. If your guitar’s in standard tuning, here’s what you’ve got:
- Open string: E
- 1st fret: F
- 2nd fret: F# (or G♭)
- 3rd fret: G
- 4th fret: G# (or A♭)
- 5th fret: A
- 6th fret: A# (or B♭)
- 7th fret: B
- 8th fret: C (no sharp between B and C)
- 9th fret: C# (or D♭)
- 10th fret: D
- 11th fret: D# (or E♭)
- 12th fret: E (octave)
That’s it. Memorize those, and you can rename any chord you move up the neck. I usually use sharps when going up and flats when coming down. It also depends on what key you’re in, but for now, just get comfortable with the notes.
The Basic E7 Chord Shape
You probably already know the open E7 chord. That’s first finger on the third string, first fret, and second finger on the fifth string, second fret. You can play all six strings. You can also add your pinky on the second string, third fret, which gives you a fuller-sounding E7.
But if we want to move this chord up the fretboard, we need to make one small change: switch to using your second and third fingers for those same frets. That frees up your first finger to become a bar.
Transposing the E7 Shape
Here’s where it gets good. When you move up one fret and bar across all six strings with your first finger, you’ve just created F7:
All six notes moved up exactly one fret. Your second finger is on the fifth string, third fret. Your third finger is on the third string, second fret. Your first finger bars everything at the first fret. That’s F7.
If you want to add that extra seventh note with your pinky, it’s now on the second string, fourth fret.
Now move that whole shape up to the third fret. What’s your root note? Check your sixth string at the third fret. That’s G. So this is G7.
Keep moving:
- 5th fret: A7
- 6th fret: A# or B♭7
- 7th fret: B7
- 8th fret: C7
- 10th fret: D7
- 12th fret: E7 (octave higher)
You just learned twelve dominant 7th chords. Same shape, different positions. That’s the power of understanding root notes and transposing.
It Works with Other Chord Types Too
This method doesn’t just apply to dominant 7th chords. You can do the same thing with the E major and E minor chord shapes. Take the open E major, switch your fingers to free up your first finger for a bar, and you’ve got F major when you move up one fret. G major at the third fret. A major at the fifth fret.
Same with E minor. Move it up, bar it, and you’ve got F minor, G minor, and so on.
It’s all the same concept: understand your root note, know your fretboard notes, and transpose the shape.
How to Practice This
Don’t try to memorize all twelve positions at once. That’s not how it works. Instead:
Start with the notes. Spend a few minutes each day naming the notes on your sixth string as you move up the fretboard. Don’t look at a chart—just test yourself.
Practice moving the E7 shape. Play it at the first fret (F7), then move to the third fret (G7), then the fifth fret (A7). Get comfortable with the bar and the shape change.
Use them in context. Play a 12-bar blues in A. You’ll need A7, D7, and E7. Find those chords using this bar chord method instead of open chords. It’ll sound fuller and you’ll start seeing how the fretboard connects.
Once you’ve got this down, you’ll never run out of chords. You’ll know exactly where every dominant 7th lives on the neck, and you won’t have to think about it.
What’s Next
📘 Blues Chord Mastery Series – Part 1 of 3
This lesson is part 1 of a three-part series on blues chords. In part 2, we’ll cover how to use these dominant 7th chords in the I-IV-V progression—the foundation of every 12-bar blues you’ll ever play. In part 3, we’ll talk about adding extensions and variations to make these chords sound even better.
For now, get comfortable with this E7 shape and moving it around. It’s one of the most useful things you’ll ever learn on guitar, and it’s going to open up the entire fretboard for you.