how to find cubic feet of a circle actually refers to calculating the volume of a cylinder, as circles are two-dimensional. To compute the cubic feet of a cylinder, use the formula: Volume = π × radius² × height. First convert dimensions to feet, then apply the formula. For example, a cylinder with a radius of 1 ft and height of 3 ft has a volume of about 9.42 cubic feet. This is useful in shipping, construction, and gardening (e.g., estimating soil volume for planters or raised beds). Accurate volume calculations aid in logistics and cost estimation.