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Smaller Circles in a Larger Circle

Estimating number of smaller circles that fits in a larger circle - ex. how many pipes or wires fits in a larger pipe or conduit

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The calculator below can be used to estimate the maximum number of smaller circles that fits into a larger circle. The calculator can be used to calculate

  • the number of smaller pipes that fits in a larger pipe or tube
  • the number of wires possible in a conduit
  • the number of fibers that fits in a connector
  • and similar applications


  • the inside diameter of the large circle (or pipe, tube, conduit, connector), and
  • the outside diameters of the small circles (or pipes, wires, fiber)

The default values are for a 10 inch pipe with 2 inch smaller pipes - dimensions according ANSI Schedule 40 Steel Pipes.

inside diameter of outside larger circle (in, mm, m ..)

outside diameters of inside smaller circles  (in, mm, m ..)



Number smaller circles within larger circle

Calculate Maximum Number of Smaller Circles in Larger Circles - array of multiple smaller and larger circles

In the boxes below

  • add a comma separated list with the sizes of the larger circles
  • add a comma separated list with the sizes of the smaller circles

An array with the maximum number of smaller circles within the larger circles will be created.

 inside diameters of outside larger circles (in, mm, m ..)

 outside diameters of inside smaller circles (in, mm, m .. )


The default input values above are from ANSI Schedule 40 Steel Pipes.

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