Three major chords and nothing else — the harmonic skeleton under rock, blues and folk.
Chords without a link don't have a chord page yet.
Drop I–IV–V straight into the interactive looper, hit play, and hear the full sequence cycle.
Play I–IV–V in the Studio →Because they are the only major chords built from the notes of the major scale, and together they harmonise every note in it. That means you can accompany most simple melodies in a key with nothing but these three, which is exactly why folk, blues and early rock lean on them so heavily.
E major. E is the I, A is the IV and B is the V. E is a favourite key for guitar because all three chords sit in open position and the low E string doubles the tonic root underneath them.
A 12-bar blues uses the same three chords but fixes them into a 12-bar form and makes all three dominant 7ths. A plain I-IV-V has no set length and uses straight major triads, so it sounds bright and resolved rather than gritty and unsettled.