Chord Progressions You Can Actually Play
A chord progression is a sequence of chords played in order, the harmonic engine under almost every song. Most are built from the diatonic chords of a key and repeat in a loop, and because the same handful of progressions turn up across thousands of songs, learning a few by heart lets you play an enormous amount of music, and hear where a song is going next.
Learn progressions by looping them
Build any progression, set a metronome, and loop it. Play each chord, know instantly if you nailed it. No download, no signup. MIDI keyboard or microphone.
▶ Try ChordRunner Free Free in the browser - loop any progression in time.Why progressions repeat across songs
Songwriters return to the same progressions because they simply work: they balance tension and resolution in a way the ear finds satisfying, and they are built from the diatonic chords that all belong to one key. The famous four-chord progression is the clearest example, so many hits use it that comedians have strung dozens together in a single medley. Learning these shared patterns is a shortcut: master a progression once and you have the bones of countless songs.
See a progression in any key
Pick a progression and a key, and watch the roman numerals turn into real chords.
The progressions to know first
Four progressions carry an astonishing amount of music. I-V-vi-IV is the modern pop workhorse, from Let It Be to countless chart songs. I-vi-IV-V is the doo-wop progression behind Stand By Me and 1950s rock. ii-V-I is the fundamental jazz cadence, best played with sevenths. And the twelve-bar blues, built from just the I, IV and V as dominant sevenths, underlies blues, rock and roll and much of what grew out of them. Learn these four and you can busk through a huge range of songs.
Roman numerals make progressions portable
Writing a progression as I-V-vi-IV instead of C-G-Am-F is what makes it reusable: the numerals describe roles in the key, so the same pattern works in every key once you know that key's diatonic chords. Change the key with the buttons above and the shape stays the same while the letters change. This is also why the circle of fifths matters: the strongest progressions move by fifths, stepping around the circle toward home.
Practise progressions in the game
Reading a progression is not the same as playing it in time. ChordRunner's Chord Progression mode lets you define any sequence of chords, set a metronome and per-chord timing, and loop it, so you drill the changes at a steady pulse rather than stopping to think between chords. Play each on your MIDI keyboard or into your microphone and the game checks you in real time. Start with I-V-vi-IV and loop until the changes feel automatic. Free in the browser, nothing to install.
Common questions
What is a chord progression?
A chord progression is a sequence of chords played in order, the harmonic backbone of a song. Most progressions use the diatonic chords of a key and repeat in a loop. Because the same few progressions appear across thousands of songs, learning them lets you play a huge amount of music.
What are the most common chord progressions?
The four-chord I, V, vi, IV pop progression is behind countless hits. The 50s I, vi, IV, V drives doo-wop and early rock. The ii, V, I is the heart of jazz. And the twelve-bar blues, built from the I, IV and V, underlies blues and much of rock and roll.
Why are chord progressions written in roman numerals?
Roman numerals name chords by their role in the key rather than by letter, so I, V, vi, IV describes the same pattern in every key. That makes progressions portable: learn one in numerals and you can play it in any key just by knowing that key's diatonic chords.
How do I practise chord progressions?
Loop them in time. In ChordRunner's Chord Progression mode you define any sequence of chords, set a metronome and per-chord timing, and loop it, playing each chord on a MIDI keyboard or through your microphone while the game checks you in real time.