I–IV–V Chord Progression

The three most important chords in any major key. Thousands of folk, country, blues and rock songs use nothing else.

I–IV–V in every key

The numerals stay the same in every key; only the chord names change. The easiest keys on guitar are A major, D major, G major.

Songs built on I–IV–V

Questions

What chords are in the I–IV–V progression?

In G major it is G, C and D. In any other key, use the same numbered steps (I – IV – V) of that key's scale.

What is the easiest key for I–IV–V on guitar?

A major, D major and G major use open chords, so they are the easiest places to start.