Free interactive toolChord finder
Chord finder
by piano notes.
Know the notes but not the chord name? Choose any three or four keys. We'll identify possible chords using exact pitch-class matches and show alternative enharmonic spellings where appropriate.
Select your notes
Choose a set of 3 or 4 distinct pitch classes. Octaves don't change the basic chord identification.
Chord names can be ambiguous without a bass note, key and harmonic context.
How the chord finder works
The finder compares your selected pitch classes with common major, minor, augmented, diminished and seventh-chord formulas in twelve-tone equal temperament. It does not attempt to identify every possible jazz voicing or suspended chord. For slash chords and inversions, the lowest played note also matters, so use the inversion explorer if you know the bass.