Dominant 7th vs Major 7th Chords
Add a seventh to a C major triad and you get one of two very different chords — depending on which seventh. C7 (dominant) adds a flat 7; Cmaj7 (major 7) adds the natural 7. One note apart, worlds apart in feel.
The one note that changes everything
C7 is C–E–G–B♭. Cmaj7 is C–E–G–B. The root, third and fifth are identical; only the seventh moves by a half step. The flat 7 (B♭) creates a restless, bluesy tension that wants to resolve; the natural 7 (B) leans gently against the root for a lush, dreamy shimmer. Play both above and the difference is obvious.
What each one is for
The dominant 7th is the engine of motion — it's the V chord that drives a ii–V–I home, and the sound of the 12-bar blues, which sevenths every chord. The major 7th is a resting place — the glowing I chord of jazz, soul and bossa nova.
Explore both
Browse every root in the dominant sevenths and major sevenths libraries, then drill them in Chord Rush until you can tell them apart by ear instantly.
Frequently asked questions
What is the difference between a dominant 7th and a major 7th chord?
Both add a seventh to a major triad, but a different one. A dominant 7th adds the flat 7 (a whole step below the root): C7 is C–E–G–B♭. A major 7th adds the natural 7 (a half step below the root): Cmaj7 is C–E–G–B. That single note changes tense-and-bluesy into lush-and-dreamy.
When do you use C7 versus Cmaj7?
A dominant 7th (C7) is unstable and wants to resolve — it is the V chord of a key and the backbone of the blues. A major 7th (Cmaj7) is restful and colorful — it is the I chord in jazz and a staple of soul and bossa nova. Use C7 to create pull, Cmaj7 to sit and glow.
Is a major 7th chord the same as a 7th chord?
No. An unqualified "7 chord" (like C7) means the dominant 7th with a flat 7. "Major 7" (Cmaj7) specifically means the natural 7th. Mixing them up is one of the most common chord-reading mistakes.