B Dominant 7th Chord
Bluesy tension that wants to resolve
B7 is playable as an open chord near the nut (Open B7), making it one of the more beginner-friendly shapes.
Bdom7 - Open B7
What is a B7 chord?
A dominant 7th adds the flat 7 to a major triad — root, major 3rd, perfect 5th and minor 7th. That flat 7 creates an unresolved tension (the tritone between the 3rd and the b7) that 'wants' to resolve down a fifth. This is the engine of every V-I cadence in jazz and the foundation of every 12-bar blues progression where every chord is dominant.
Notes in the chord: B – D# – F# – A
Intervals: Root, 3, 5, b7 (measured from the root)
Where B7 fits in a key
B7 appears as the V7 in E major.
Common progressions with B7
ii-V7-I (jazz turnaround) — in E major
F#m → B7 → E
I7-IV7-V7 (12-bar blues) — in B blues
B7 → E7 → F#7
When to use a dominant 7th chord
B7 has the strongest pull of any chord toward E — it's the V7 of E major. Dominant 7ths are the V chord in countless major-key songs, where they pull strongly back to the I (G7 → C in C major). In 12-bar blues, every chord is dominant — I7, IV7 and V7 — for that bluesy, unresolved cycle. They also appear as secondary dominants ('V of V') to tonicize chords mid-progression, e.g. D7 leading to G in C major.
Common substitutions for B7
- •Dominant 9 — adds the 9 for a fuller, jazz-funk sound
- •Dominant 13 — adds the 13 for soul and gospel voicings
- •Altered dominant (7#5, 7b9) — for outside, jazz-fusion tension
- •Tritone substitution — replace V7 with bII7 for a chromatic resolution
Mixolydian Mode
Perfect for dominant 7th
B Blues Scale
Add blues flavor
Improvisation Basics
Learn to solo over progressions
Practice with Improvisio
Use B7 in a progression and see which scales work best.
Try it in the trainer