Circle of Fifths Calculator

Explore key relationships using the circle of fifths. Find dominant, subdominant, relative, and parallel keys.

Key Note (0=C, 1=C#, ... 11=B)

Mode (1=Major, 2=Minor)

Tab to move between fields

Sharps (+) / Flats (-)

Dominant Key (semitone)7

Subdominant Key (semitone)5

Relative Key (semitone)9

Parallel Key (semitone)0

Enharmonic Key (-1 if N/A)-1

How to Use This Calculator

Enter Key Note (0=C, 1=C#, ... 11=B) and Mode (1=Major, 2=Minor).
Review the Sharps (+) / Flats (-) result.
Use Dominant Key (semitone) and Subdominant Key (semitone) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

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