What Is a Minor Triad?
A minor triad is a three-note chord that sounds dark, introspective, and stable. It's built from a root note, a minor third above that root, and a perfect fifth above the root.
The minor third interval — exactly 3 semitones, one semitone lower than a major third — is what gives the minor triad its distinctive dark quality. It's not sad or angry — just inward and reflective. A minor triad is like the major triad's quieter, more thoughtful sibling.
How to Build a Minor Triad
Formula
Root + 3 semitones + 4 semitones
Or: Root + Minor 3rd + Perfect 5th
To build any minor triad, pick a root note and count up from there.
Example: C Minor Triad
- C (root)
- E♭ (3 semitones up from C = minor third)
- G (4 semitones up from E♭ = perfect fifth, or 7 semitones up from C)
Notice the difference from a major triad: the major third (C to E) becomes a minor third (C to E♭). That single semitone shift changes the entire character from bright to dark, while keeping the same stable perfect fifth.
All 12 Minor Triads
Apply this formula to all 12 roots and you get every minor triad:
| Chord | Root | Minor 3rd | Perfect 5th |
|---|---|---|---|
| Cm | C | E♭ | G |
| Gm | G | B♭ | D |
| Dm | D | F | A |
| Am | A | C | E |
| Em | E | G | B |
| Bm | B | D | F# |
| F#m | F# | A | C# |
| Fm | F | A♭ | C |
| B♭m | B♭ | D♭ | F |
| E♭m | E♭ | G♭ | B♭ |
| A♭m | A♭ | C♭ | E♭ |
| D♭m | D♭ | F♭ | A♭ |
The Sound of a Minor Triad
Dark, introspective, stable, melancholic, contemplative.
The minor triad is not unstable — it's resolved and complete, just like the major triad. The difference is emotional colour. Where the major triad sounds open and bright, the minor triad sounds closed and inward. It's the sound of depth, reflection, and complexity.
Minor triads are everywhere in music. Blues, rock, folk, classical — any genre that explores emotion uses minor triads. They're not inherently sad; they can sound mysterious, cool, sophisticated, or determined depending on context.
Minor Triads in Keys
In any major scale, exactly three of the seven triads are minor: the II chord, the III chord, and the VI chord. In a minor key, the I chord is minor — it's the home chord.
C Major scale minor triads: Dm (II) · Em (III) · Am (VI)
C Minor scale: Cm (I) is the home chord
The vi chord in a major key (the relative minor) sounds sad compared to the I major chord. A-minor in the key of C Major creates a darker atmosphere while still belonging to that key. This is why minor chords in major keys create contrast and emotional depth.
How to Use Minor Triads
1. As the I chord in minor keys: Every minor key is built on a minor triad home chord. A minor songs come to rest on Am, D minor songs resolve to Dm.
2. In major-key progressions: Use the ii, iii, or vi minor triads to create contrast and complexity. Am in the key of C Major sounds darker but still cohesive.
3. In progressions: i-VII-VI-VII is a classic progression in minor keys. i-iv-v is another foundation (like I-IV-V in major).
4. Arpeggiated: Break the chord into individual notes and create melodic patterns. Folk music is full of arpeggiated minor triads.
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