Canadian Cobble Systems

A formula for figuring amount of material required to make circular patterns larger than the standard 3' 4" circle created by utilizing (2) half circle patterns. An example would be a 20 foot diameter circle. It would require 2 half circle patterns and 305 square feet, or 61 straight pieces.

• Circle Calculator

Diameter

Radius

Radius ²

Circle Area

Circle Pattern Area

Straight sq. ft. needed

Straight pieces needed

*Enter Diameter

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