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A half-diminished chord

The Am7♭5 chord (half-diminished) is made of the notes A, C, E♭, G. Its formula compared with the major scale is 1 ♭3 ♭5 ♭7.

Am7♭5

Sevenths · 4 notes

Note names

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How it is built

DegreeNoteInterval from the root
1AUnison
♭3CMinor third
♭5E♭Diminished fifth
♭7GMinor seventh

Inversions

  • Am7♭5A C E♭ GRoot position
  • Am7♭5/CC E♭ G AFirst inversion
  • Am7♭5/E♭E♭ G A CSecond inversion
  • Am7♭5/GG A C E♭Third inversion

Which keys it belongs to

Am7♭5 is a diatonic chord, that is, it comes from a degree of the scale, in these keys:

Frequently asked questions

Which notes make up the Am7♭5 chord?
The notes are A, C, E♭, G.
What is the formula of the Am7♭5 chord?
The formula is 1 ♭3 ♭5 ♭7: minor third, diminished fifth, minor seventh.

Texts and tools by , professional musician and developer. Last updated: October 8, 2026.

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