For songwriters & musicians

Chord Decoder

Type any chord symbol and instantly see what it means, what notes are in it, and what makes it sound the way it does.

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Full Chord Name

C Major 7th

Beginner translation: A major chord with a soft, dreamy extra note.

Notes in the Chord
CEGB
Intervals
  • RootC
  • Major 3rdE
  • Perfect 5thG
  • Major 7thB
Why It Sounds That Way

A major triad plus a major 7th — the half-step between the 7th and the root creates that famous dreamy tension.

Sounds like: Warm and jazzy — the major 7th adds a dreamy quality.

Chord Symbols Explained

A beginner's guide to reading chord notation — without the music-school jargon.

The big letter = the root note

Every chord symbol starts with a capital letter — that's the root note. "C" means the chord is built on C. A sharp (♯ or #) raises it a half-step; a flat (♭ or b) lowers it. So "B♭" is just B-flat, and "F♯" is F-sharp.

Lowercase "m" or "min" = minor

If you see Am or Amin, that's an A minor chord. No "m" means major — so plain "A" is A major. That tiny letter is the difference between a happy and a sad chord.

Numbers add extra notes

7, 9, 11, and 13 mean extra notes are added on top of the basic chord. The bigger the number, the more colorful and "jazzy" the chord usually sounds. maj7specifically means a major 7th (the dreamy one), while just 7on its own means a flat 7th (the bluesy one).

"sus", "add", "dim", "aug" — chord modifiers

sus ("suspended") swaps the 3rd for a 2nd or 4th — gives the chord a floating, unresolved feel. add just adds an extra note (like add9) without removing anything. dim means diminished (dark, tense), aug means augmented (dreamy, off-balance).

Slash chords: G/B means "G with B in the bass"

A slash chord like G/B is read as "G over B." The chord on the left (G) is what's being played; the note on the right (B) is the bass note. It's the same G chord, just with a different lowest note — usually used to create a smooth, walking bass line between chords.

Common Chord Symbols Quick Reference

Examples shown using C as the root — the same patterns apply to any letter.

SymbolPlain English
CC Major (root, major 3rd, 5th)
CmC Minor (root, minor 3rd, 5th)
C7C Dominant 7th — bluesy, restless
Cmaj7C Major 7th — warm, jazzy
Cm7C Minor 7th — smooth, mellow
Cm7b5C Half-Diminished — unstable, aching
CdimC Diminished — dark, tense
Cdim7C Diminished 7th — suspenseful
Caug or C+C Augmented — dreamlike, off-balance
Csus2C Suspended 2nd — open, floating
Csus4C Suspended 4th — hopeful, unresolved
Cadd9C Add 9 — major chord with sparkle
C9C Dominant 9th — funky, bluesy
Cmaj9C Major 9th — soft, dreamy
Cm9C Minor 9th — neo-soul, melancholic
C11C Dominant 11th — gospel, soulful
C13C Dominant 13th — full, jazz-funk
C/EC Major with E in the bass (slash chord)
G/BG Major with B in the bass
Bb/DB♭ Major with D in the bass