Free practice tool
Interactive Circle of Fifths
Tap any key to see its key signature, its chords and the keys closest to it. Then test yourself with the key signature quiz.
Outer ring: major keys. Inner ring: relative minor keys. Gold shows the chords in the selected key.
Major key
C major
Chords in this key
Tap a chord to hear it.
Try these progressions
Key signature quiz
Which major key is this?
Tap the answer on the circle.
0 / 0
correct
Clockwise adds a sharp
Each step to the right goes up a fifth (C to G to D) and adds one sharp.
Counterclockwise adds a flat
Each step to the left goes up a fourth (C to F to B♭) and adds one flat.
Neighbors sound good together
The keys on either side, and the minors under them, share most of their notes. That's why I, IV and V work so well.
Order of sharps and flats
Sharps: F C G D A E B ("Father Charles Goes Down And Ends Battle"). Flats are the same letters backwards.
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