Diameter calculator is a mathematical online tool for the calculation of the diameter from the circumference. The circumference of a circle is given as 2$\pi$r, here 2r is the diameter. So, we can calculate the diameter from the circumference.
Step1: Write down the given circumference which is equal to 2$\pi$ r.

Step2: The diameter is given by, d=2r=$\frac{Given\ value}{\pi }$