Circle of Fifths Calculator
Explore key relationships using the circle of fifths. Find dominant, subdominant, relative, and parallel keys.
Inputs
Results
Sharps (+) / Flats (-)
0
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.
What each input means
- Key Note (0=C, 1=C#, ... 11=B)
- The tonic note of the key.
- Mode (1=Major, 2=Minor)
- Whether the key is major or minor.
How this is calculated
Worked example, using the default values
- Identify Input ParametersKey Note (0=C, 1=C#, ... 11=B) = 0, Mode (1=Major, 2=Minor) = 1 = 2 input(s) provided
- Calculate Sharps (+) / FlatsSharps (+) / Flats0 = 0
- Calculate Dominant KeyDominant Key7 = 7
- Calculate Subdominant KeySubdominant Key5 = 5
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