Understand and Play the G 7b5 Chord on Guitar

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G 7b5 position 1 guitar chord diagram

G7b5 is the G seventh flat five chord, built from G, B, Db and F. Start with G7 (G, B, D, F) and drop the D to Db: that single change gives the chord its restless, unresolved colour.

The page holds three voicings, one barre among them, with the lowest at the 3rd fret. The notes of the chord all sit in the G Lydian dominant scale, a Mixolydian scale with a raised fourth, so that is a good scale for a solo. G7b5 also shares its four notes with Db7b5.

Play into the microphone and the player shows which strings sound.

G 7th with flat 5th guitar chord is also written as G7b5, G7(b5) or G7-5.

Notes of the G 7b5 chord:

G B Db F

How to create the Dominant Seventh Flat five chord:

Formula: 1 3 b5 b7

G 7b5 Guitar Chord Diagrams

Position 1 Movable

G 7b5 position 1 guitar chord diagram

Finger Positions

  • Mute the B string
  • Mute the high E string
  • Place your index finger (1) on the fret 3 of the low E string
  • Place your middle finger (2) on the fret 3 of the D string
  • Place your ring finger (3) on the fret 4 of the A string
  • Place your pinky finger (4) on the fret 4 of the G string

Position 2 Movable

G 7b5 position 2 guitar chord diagram

Finger Positions

  • Mute the low E string
  • Mute the A string
  • Place your index finger (1) on the fret 5 of the D string
  • Place your middle finger (2) on the fret 6 of the G string
  • Place your ring finger (3) on the fret 6 of the B string
  • Place your pinky finger (4) on the fret 7 of the high E string

Position 3 Barre Movable

G 7b5 position 3 guitar chord diagram

Finger Positions

  • Mute the low E string
  • Mute the high E string
  • Place your index finger (1) on the fret 10 of the A and G strings at the same time
  • Place your middle finger (2) on the fret 11 of the D string
  • Place your ring finger (3) on the fret 12 of the B string

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Play This Chord With Other Roots

C 7b5 | D 7b5 | E 7b5 | F 7b5 | G 7b5 | A 7b5 | B 7b5 | C#7b5 | D#7b5 | F#7b5 | G#7b5 | A#7b5 | Ab7b5 | Bb7b5 | Db7b5 | Eb7b5 | Gb7b5

Giancarlo Facoetti, founder of FaChords Guitar

Created by

Giancarlo Facoetti

Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher

FAQ

What notes are in G7b5?

G7b5 contains G, B, Db and F. It is G7 with the fifth, D, lowered by a semitone to Db.

What is the tritone in G seventh flat five?

G and Db are a tritone apart, and so are B and F. The chord contains both pairs together.

How many G7b5 voicings are there?

There are 3 voicings, from fret 3 to fret 12. One is a barre voicing and none uses an open string.

Which scale fits G7b5?

The G whole-tone scale is G, A, B, C#, D# and F. All four chord pitches are in it, with the chord's Db written as C#.

How does G7b5 differ from G7?

G7 has G, B, D and F. G7b5 replaces the D with Db, a semitone lower, so the fifth is diminished.