Sphere diameter to surface area calculator. The longest distance from one end point of a circle to the other is called diameter simply it is two times from the radius. A p r2.
A p r2.
Or when you know the Diameter. Enter the diameter of a circle. A pi d22 a pd22 Using the Diameter Calculator You can enter the diameter and then compute radius and circumference in mils inches feet yards miles millimeters centimeters meters and kilometers. The formula used to calculate the circle diameter is.