A dim7 Chord on Guitar
Play A dim7 on Guitar: diagrams, finger positions, intervals, and every voicing up and down the neck for this instrument.
The A dim7 chord is a diminished chord built from stacked minor thirds, often used as a passing or leading chord. It is built from the notes A, C, D#, F#. This page shows how to play A dim7 on Guitar with clear fretboard diagrams and suggested finger positions.
The A string ring open in the lowest shape, with the remaining notes fretted at fret 1 over a 2-fret stretch. The E string stays silent, so 5 of 6 sound. The root is the A string itself. It sounds from A2 up to F#4. 2 voicings are charted, the highest starting at fret 12.
Guitar is tuned E–A–D–G–B–E, with 15 frets to work with.
Browse alternate voicings to find the one that sits best under your fingers, then compare it with the other chord types built on A or explore the same shape in nearby keys. The diagrams list the notes in each voicing so you can connect the shape to the theory behind it.