Interactive Chord Progression Trainer

What is a chord progression?

A chord progression is a sequence of chords played in a set order, usually built from the notes of a single key. Musicians label the chords with Roman numerals (I, ii, IV, V, vi) instead of chord names so the same progression can be recognized and transposed into any key — I–IV–V–I means the same thing whether it's played in C major or G major.

A handful of progressions — I–V–vi–IV, ii–V–I, vi–IV–I–V, and the 12-Bar Blues among them — show up across pop, rock, jazz, and blues because the chords lead smoothly into one another. Learning to hear and play these patterns is one of the fastest ways to recognize what's happening in songs you already know.

How to use this tool

1. Choose a key and a progression from the controls above the keyboard.
2. Use Guided Practice to play each chord in order and get feedback as you go, or switch to Free Practice to explore the progression at your own pace.
3. Watch the Roman numerals change with each chord to learn the pattern, not just the shape.
4. Adjust the tempo (BPM) slider to practice chord changes slowly before speeding up.
5. Switch keys to hear how the same progression sounds and feels in a different part of the piano.
6. Once a progression feels comfortable, use Practice Mode to drill the individual chords with a metronome.