The Circle of Fifths
One diagram that ties together every key, key signature, and chord relationship in music. Spin the interactive wheel below to explore any key — its notes, its sharps or flats, its relative minor, and its sound.
What is the circle of fifths?
The circle of fifths arranges all twelve keys around a circle so that each step clockwise moves up a perfect fifth — C, G, D, A, and so on. It's the single most useful map in music theory: it shows how many sharps or flats each key has, which keys are closely related, and where every relative minor lives.
How to read it
- Top (12 o'clock) is C major — no sharps, no flats.
- Clockwise adds sharps. G has 1 sharp, D has 2, A has 3, and so on.
- Counter-clockwise adds flats. F has 1 flat, B♭ has 2, E♭ has 3, and so on.
- The inner ring is the relative minor of each major key — same notes, different home.
- Neighbors are closely related and share most of their chords, which is why they sound good together.
Why "fifths"?
Each key is a perfect fifth (seven semitones) above the one before it. That interval is the strongest, most stable relationship in Western harmony, which is exactly why the V chord pulls so hard back to I — the whole system of tension and resolution is baked right into the circle.
Common questions
What is the circle of fifths?
A diagram of the 12 keys arranged so each is a perfect fifth apart. Clockwise adds sharps, counter-clockwise adds flats, and it reveals key signatures, related keys, and relative minors at a glance.
How do you memorize the circle of fifths?
Use a mnemonic for the sharp keys clockwise (C G D A E B) and the flat keys counter-clockwise (C F B♭ E♭ A♭ D♭). Many players remember "Father Charles Goes Down And Ends Battle" for the order of sharps.
Why is it called the circle of fifths?
Because moving clockwise, each key is a perfect fifth above the last — C to G, G to D, and so on — returning to C after twelve steps.
How does it help with chords and songwriting?
Adjacent keys share most of their chords, so the circle shows you which chords and keys sound related. The I, IV, and V chords of any key are always neighbors on the wheel.
Put it into practice
Melody Monkey shows any key's scale and chords on a live fretboard or keyboard — pick a key and start playing.
Open the free app →Still stuck? Ask Your Personal Music Teacher about The Circle of Fifths →