A m7b5 Guitar Chord | Play, Hear and Practice Interactively
A half-diminished (written Am7b5) takes its name from its interval stack, the root, minor third, flat five and minor seventh, which gives the notes A, C, Eb and G. The only tritone in the chord lies between the root and the flat five. The single voicing on this page spans fret 4 to fret 5.
Looking for a scale to play over it? The A Locrian scale contains all four notes of Am7b5. The logic of stacking thirds is explained in how chords are built. Turn on the note labels in the interactive fretboard at the top to read the name of every note under your fingers.
A minor 7th with flat 5th guitar chord is also written as Am7b5, Am7(b5), Aø7 or Amin7b5. It is also known as the A half-diminished chord.
Am7b5 Chord Notes and Formula
Notes in the A m7b5 chord:
How the Minor Seventh Flat five chord is built:
Formula: 1 b3 b5 b7
Am7b5 Chord Interactive Fretboard
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Am7b5 Guitar Chord Diagrams
Position 1 Movable
Finger Positions
- Mute the A string
- Mute the high E string
- Place your index finger (1) on the fret 4 of the B string
- Place your middle finger (2) on the fret 5 of the low E string
- Place your ring finger (3) on the fret 5 of the D string
- Place your pinky finger (4) on the fret 5 of the G string
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Chords That Go With Am7b5
One key where Am7b5 fits is Bb major, where it works as the vii chord. These are the main chords of that key, the ones you will often hear around it:
See every key in the guitar keys chart, or build a progression with these chords in the chord progression generator.
More A Chords
Want to know how this chord is built? Read diminished and half-diminished chords, or browse all A guitar chords.
Created by
Giancarlo is a musician (teaching guitar since 2000), software engineer, AI consultant and published researcher
FAQ
Which notes are in the Am7b5 chord?
Am7b5 contains A, C, Eb and G. These are the root, minor third, flat fifth and minor seventh. Eb is six semitones from A, and G is ten.
How does A half-diminished differ from A minor seventh?
The fifth is the only change. A minor seventh has E, while Am7b5 lowers it to Eb. The minor third C and minor seventh G are shared.
Is Am7b5 the same as Adim7?
No, they differ by one note. Am7b5 ends on G, a minor seventh, and Adim7 ends on Gb, a diminished seventh. Both begin A, C, Eb.
In which keys is Am7b5 a diatonic chord?
Am7b5 is the vii chord of Bb major and the ii chord of G minor. Its notes all fall inside both scales.
How many Am7b5 voicings are there on guitar?
There is 1 voicing, with no open string and no barre. It sits between fret 4 and fret 5.
