Tips for Learning the A Blues Scale on Guitar
It is A minor pentatonic plus one note
Take A minor pentatonic (A C D E G) and slip an Eb between the 4th (D) and 5th (E). That single ♭5 — the "blue note" — is the only difference, so if you already know the fret-5 box you are one note away from the blues scale.
The blue note is a passing tone
The Eb sounds tense on its own — use it to pass through, bending or sliding from D up to E, rather than landing on it. Held too long it clashes; used in motion it gives the scale its vocal, crying quality.
The famous box at fret 5
Anchor the first position at fret 5 with the root A on the low E string — the same shape as A minor pentatonic, with the Eb sitting one fret below the E on each string. It is the most-played blues box in rock and blues lead guitar.
Open A and E strings are scale tones
The open A string (root) and the open low and high E strings (5th) all belong to the A blues scale, giving you resonant open-string anchors for licks in open position.
Target A, C, and E
Those three notes spell an A minor chord and make your phrases sound resolved. D, Eb, and G are colour tones — and the Eb is the spiciest of them, best saved for the moment you want tension.
About the A Blues Scale
The A blues scale is six notes — A, C, D, Eb, E, G — the A minor pentatonic scale with one extra note, the ♭5 (Eb), added between the 4th and 5th. That added tone is the famous "blue note": it creates the tense, vocal, crying sound that defines blues and rock lead guitar. On the fretboard the A blues scale sits in the same five box positions as A minor pentatonic — most famously the box at fret 5 — with the blue note tucked one fret below the 5th on each string. It is one of the most useful scales a lead guitarist can learn, working over A minor, A7, and twelve-bar blues progressions in A.
- 01Notes: A – C – D – Eb – E – G
- 02Scale degrees: 1 – ♭3 – 4 – ♭5 – 5 – ♭7
- 03Built by adding the ♭5 (Eb) "blue note" to A minor pentatonic
- 04Six notes — the minor pentatonic plus one chromatic passing tone
- 05Open A string (root) and open E strings (5th) are scale tones
- 06Shares the same five box shapes as A minor pentatonic
- 07Works over A minor, A7, and twelve-bar blues in A
A Blues — note by note
Every blues scale uses the same six-note formula — scale degrees 1, ♭3, 4, ♭5, 5, and ♭7. It is the minor pentatonic with the ♭5 "blue note" added between the 4th and 5th, the chromatic passing tone that gives the blues scale its signature tension and vocal cry.
| Degree | Note | Role | Interval (from root) |
|---|---|---|---|
| 1 | A | Root (tonic) | Unison (0 st) |
| ♭3 | C | Minor third | +3 semitones |
| 4 | D | Perfect fourth | +5 semitones |
| ♭5 | D# / Eb | Blue note (♭5) | +6 semitones |
| 5 | E | Perfect fifth | +7 semitones |
| ♭7 | G | Minor seventh | +10 semitones |