12 Bar Blues Piano for Beginners (Sing and Play Along)

The 12 bar blues uses only the I, IV and V major chords (C, F and G in the key of C), arranged in three four-bar lines: I-I-I-I, IV-IV-I-I and V-IV-I-I, with optional IV in bar 2 and a V turnaround in the final bar.

Video lesson by Jason Zac · Beginner · 14 min

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This lesson is the first part of Jason Zac's beginner blues series at Nathaniel School of Music. It teaches the 12 bar blues chord progression on the piano in C major, how to connect the chords smoothly with inversions, and how the blues is built from sung phrases. It suits new pianists and players from other genres who want a solid foundation in the blues, the style that has shaped so much contemporary music. Keep a notebook nearby to write down the chords and the form.

The Three Chords: I, IV and V

Build the chords on the C major scale. The blues uses only three chords, and all of them are major:

• I chord: C major (C, E, G)
• IV chord: F major (F, A, C)
• V chord: G major (G, B, D)

You can play this in any key; C is simply the easiest place to start.

Connecting the Chords with Inversions

Each chord has three notes, so you can rearrange them into inversions. Choosing inversions that sit close together gives good voice leading and makes the changes easier for your hand. Instead of jumping up to F A C from C E G, move to C F A, where the C stays put.

Three useful starting positions:

• C E G, then C F A, back to C E G, then B D G
• E G C (first inversion), then F A C, back to E G C, then D G B
• G C E, then A C F, back to G C E, then G B D

For the full progression, the lesson starts C major as E G C and plays G major as D G B. Sing or say the note names as you play so you can find your way back if something goes wrong.

The 12 Bar Form

Count a steady pulse of 1, 2, 3, 4. Each bar gets four chord strokes in the right hand while the left hand holds the root note of the chord. The 12 bars are grouped into three lines of four bars:

1. Line 1: I, I, I, I (C, C, C, C)
2. Line 2: IV, IV, I, I (F, F, C, C)
3. Line 3: V, IV, I, I (G, F, C, C)

Two Common Variations

• In bar 2, play the IV chord (F) instead of the I, giving I, IV, I, I for line 1. This adds extra flavour.
• In the very last bar, play the V chord (G) instead of the I. This turnaround leads you neatly back to the I chord at the start of the next 12 bar cycle.

The Phrase Structure: A, A' and B

Blues lyrics are almost poetic in shape. Each 12 bar cycle holds three phrases:

• A (line 1): the singer states a line.
• A' (line 2): the same lyric and nearly the same melody, now over different chords, perhaps with a small melodic variation.
• B (line 3): a new lyric and melody that answers the first line.

The lesson demonstrates this with the blues classic I'm Tore Down. The opening line is sung over the I chord, repeated over the IV chord and back to I, and the answering line lands across the V, IV and I chords. You can also add a stop, where the band cuts out to highlight the singer or a soloist's lick.

How to Practise

1. Write out the three lines of the form in your notebook.
2. Play each chord with its inversions until the moves between C, F and G feel easy.
3. Play the full 12 bars slowly with four strokes per bar, holding the root in the left hand while you count aloud.
4. Try the bar 2 IV chord and the final-bar V turnaround.
5. Sing as you play. Accompanying yourself on a classic like I'm Tore Down, Sweet Home Chicago or Backwater Blues makes you a better accompanist for anyone.

In the next part of the series, the left and right hands get dedicated blues rhythm patterns built on this form.

Questions about this lesson

What chords are in a 12 bar blues in C?

Only three major chords: C major (I), F major (IV) and G major (V). All three chords in the blues are major.

What is the order of chords in the 12 bar blues?

Line 1 is four bars of I, line 2 is two bars of IV and two bars of I, and line 3 is one bar each of V and IV followed by two bars of I. In C that is C-C-C-C, F-F-C-C, G-F-C-C.

What is a blues turnaround?

It means playing the V chord (G in the key of C) in the final bar instead of the I chord. This leads naturally back to the I chord at the start of the next 12 bar cycle.

What does AA'B mean in the blues?

It describes the three phrases in each 12 bar cycle. A is a sung line, A' repeats almost the same line over different chords, and B is a new line that answers it.

Practise it

• Chord TreesStart from a note and explore related chords, inversions and voicings.
• Voicing RoomA hands-on lesson room for piano chord voicings.
• Piano classes at Nathaniel School of MusicLive online or in Bangalore, with a teacher.
• All free music apps40 practice tools for harmony, rhythm, ear training and more.

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