Seventh Chords on Piano: Dominant, Major, Minor, Diminished
Published February 9, 2026
Learn seventh chords: dominant 7th, major 7th, minor 7th, and diminished 7th. Add color and tension to your playing.
Key Takeaways
- Seventh chords add a fourth note (the seventh) to a triad.
- Dominant 7th (7) = major triad + minor seventh. Most common.
- Major 7th (maj7) = major triad + major seventh. Dreamy, lush.
- Minor 7th (m7) = minor triad + minor seventh. Smooth, versatile.
- Diminished 7th (dim7) = minor triad + diminished seventh. Tense, unstable.
What Is a Seventh Chord?
A seventh chord is a four-note chord built by adding a seventh interval on top of a triad. This adds color, tension, and complexity to the basic major or minor sound.
There are five common types of seventh chords: major 7th (maj7), dominant 7th (7), minor 7th (m7), half-diminished 7th (m7b5), and diminished 7th (dim7 or °7).
Seventh chords are the foundation of jazz, blues, and much of popular music. They create the tension-and-release motion that makes music compelling.
The Four Most Common
Dominant 7th (C7): C - E - G - Bb. Major triad with a minor seventh. This is the most common seventh chord. It has a strong pull to resolve to the chord a fifth below (F major).
Major 7th (Cmaj7): C - E - G - B. Major triad with a major seventh. This chord sounds lush, dreamy, and resolved. Common in jazz and R&B.
Minor 7th (Cm7): C - Eb - G - Bb. Minor triad with a minor seventh. Smooth, sophisticated, and versatile. Common in jazz, funk, and pop.
Diminished 7th (Cdim7): C - Eb - Gb - A. Minor triad with a diminished seventh (double-flat seventh). Very tense and unstable, usually resolves to a major or minor chord.
Practice Exercises
- 1Play C major triad, then Cmaj7 (add B). Listen to how the major seventh adds a dreamy quality.
- 2Play C major triad, then C7 (add Bb). Listen to the bluesy pull of the dominant seventh.
- 3Practice the 'II-V-I' progression in C: Dm7 - G7 - Cmaj7. This is the most important jazz progression.
Common Mistakes
- Confusing major 7th with dominant 7th. Cmaj7 = C-E-G-B; C7 = C-E-G-Bb. Different sounds, different uses.
- Playing seventh chords too heavily. They often sound best with a lighter touch, especially major 7ths.
- Not resolving dominant 7th chords. A dominant 7th wants to move to the chord a fifth below (e.g., G7 to C).
Frequently Asked Questions
Which seventh chord should I learn first?
Start with the dominant 7th. It is the most common and appears in blues, rock, jazz, and pop. Learn C7, G7, and D7 first.
How do I read chord symbols like Cmaj7 or Cm7?
C7 = C dominant 7. Cmaj7 = C major 7. Cm7 = C minor 7. Cmaj7 can also be written as CΔ7. Cmin7 or C-7 both mean C minor 7.
Can I use seventh chords in any genre?
Seventh chords appear in nearly every genre. Blues is built on dominant 7ths. Jazz uses all types. Pop uses major 7ths and minor 7ths extensively.
What is the 'blues note' in a dominant 7th?
The flat seventh (b7) is the blues note. In C7, the Bb gives the chord its bluesy character. This note is what makes the dominant 7th sound so expressive.