Circles around a Circle | Draw a Circle

Plotter and Calculator: Circles around a Circle

Calculates the size of circles around a central circle and plots a draft. With a gap of 0, the outer circles touch each other, with a negative gap they overlie. A large number of outer circles together with a negative gap generates interference patterns. Example generates a typical interference pattern. Small circles with a positive gap around a large circle you can find e.g. in a ball bearing.

Radius central circle:
Number of outer circles:
Gap between outer circles:
Radius outer circles:


Image size: Open in new tab
Background color: Central circle color: Outer circles color:
Fill central circle Fill outer circles Invert
Plot of the proportions, without scale:

Gaps, where they shouldn't be, are due to rounding.
Save image with right-click. Images generated with this tool can be used without restrictions.

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