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The 12-bar blues is one of the most influential chord progressions in Western popular music. Built around a repeating twelve-measure pattern, it forms the foundation of traditional blues as well as countless rock, jazz and rhythm & blues songs.

What is the 12-bar blues?

The standard 12-bar blues is based on the three primary chords of a key: the I, IV and V chords. A typical progression follows this pattern:

  • Measures 1–4: I
  • Measures 5–6: IV
  • Measures 7–8: I
  • Measure 9: V
  • Measure 10: IV
  • Measures 11–12: I

Many blues musicians add variations such as dominant seventh chords, quick changes or turnarounds, but the twelve-measure structure remains the defining feature.

How is the 12-bar blues used in piano playing?

Learning the 12-bar blues is one of the best ways to develop accompaniment, improvisation and rhythm skills on the piano. Once you know the progression, you can play with other musicians without relying on written music.

The 12-bar blues also provides an ideal framework for practicing blues scales, improvisation, walking bass lines and turnarounds, making it an essential foundation for many styles of piano playing.