Give this page a set of musical notes and/or chords, and it'll tell you what chords and scales contain or are contained by that set (along with all the notes in those scales and chords). You can use this to help you:

Learn what notes are in given chords or scales.

Identify chords from given notes.

Learn how various chords are related to each other.

Identify a key / mode / scale used in a song from the song's melody or chords.

After entering all your notes via the text input or the note buttons, either hit RETURN in the text input or click the "Find chords & scales" button.

Rules for entering notes and chords as text: