Chords in Every Key
The seven chords that belong to each of the 24 major and minor keys, with roman numerals, the progressions they build, and the relative key they share their notes with.
Once you know the key a song is in, you know almost every chord it will use. Each page below lists the seven diatonic chords, shows the progressions they most often form, and links through to the individual chord and scale references. Play along in any key with scale highlighting in the app.