This tool can be useful for suggesting possible symbols for complex chords, but it is not a substitute for proper chord analysis, which should always take context into consideration. It will liberally accept a wide range of input and do its best to find a matching chord symbol, even if there is no third or fifth. Two or more notes of unique pitch class constitute a “chord” that can be analyzed. The interpretation of input is always literal, as are the results. For example, an A7♯9 chord has a B♯ in it—never a C—even though it may be written that way in practice, and a G13 will always have all the members present (3, 5, ♭7, 9, 11, and 13), even though some may be omitted in practice.
Specify Chord Symbol Preferences

Minor Thirds

Major Sevenths




Redundancy of 7ths

Missing Thirds & Fifths

Open Fifths (Power Chords)




G+add9 G(♯5add9)
D♯ø D♯mmin7♭5
E♭5 E♭omit3

By Ascending Pitch

Pitch MIDI Role Role as

By Ascending Interval

Role Role as
Pitch MIDI Semitone


Check all that apply.   Clear Keyboard

Guitar Fretboard

This guitar is in standard tuning. Select the notes of the chord.   Clear Fretboard   Clear 1   Clear 2   Clear 3   Clear 4   Clear 5   Clear 6

Pitch Class

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Root Include
In Chord

Root & Intervals

Specify the root and then select all the intervals that apply.


Drag notes onto the staff. (This requires support for mouse-based drag-and-drop on your device.)
Note with a double sharp
Note with a sharp
Note without an accidental
Note with a flat
Note with a double flat

Chord Symbol

Enter the symbol you'd like to analyze. You can use lowercase b and # as substitutes for the ♭ and ♯ characters. You can use lowercase o, °, or dim to indicate diminished chords. You can use ø, hd, or minor seven ♭5 notation to indicate half diminished chords. You can use lowercase m, -, or min for minor. To indicate major sevenths, you can use uppercase M, maj, or △. To indicate augmented chords, use + or aug.
Chord Calculator is liberal in what it accepts, but conservative in its reply. However you enter a chord, it'll be rewritten using your stated chord symbol preferences. Also, it may optimize or rearrange the chord symbol you've entered. For example, Gadd4omit3 is accepted, but Gsus4 is returned. Also, some input may be ambiguous. For example, G4 might mean Gadd4 or Gsus4, but Chord Calculator will always assume a suspended chord is intended.
The constituent notes of the chord will be displayed.
Chord Symbol Inversion Triadic Quality Voicing Confidence Action
While the chord symbols given here will unambiguously tell you the pitch classes within a chord, some are better than others. What to call a chord is, in many cases, subjective, and the chord symbol system is not perfect. However, if you see something that's definitely wrong, say something!
The confidence ratings are an attempt to determine the “best” or, perhaps, most likely name for a given chord. Chord Calculator deducts points for complexity, multiple added intervals, inversions, uncommon enharmonic spellings for constituent notes (like E♯ instead of F, for example), missing thirds and fifths, and whether the given intervals are in the stated octave. (For example, is the “11th” really more than an octave from the root?) Ratings of 100% are likely to be a very good name for the chord. High 90s are probably strong (and sometimes better) alternatives.
Chord Calculator is designed for close harmony and does not ever propose “slash” chords. G/B will always come out as G in 1st inversion and G/F♯ will be Gmaj7 in 3rd inversion, even when it's “obvious” that the F♯ is part of a descending bass line, for example.