Final answer:
An equation of a circle in standard form calculator determines the radius and center of the circle by interpreting the standard equation form (x - h)^2 + (y - k)^2 = r^2. It does not calculate the area or the diameter directly.
Step-by-step explanation:
An "equation of a circle in standard form" calculator is designed to determine the radius of the circle and the center of the circle. If the standard form of the circle's equation is given as (x - h)^2 + (y - k)^2 = r^2, where (h,k) is the center of the circle and r is the radius, then the calculator will provide these specifics based on the given equation. It does not calculate the area or the diameter of the circle directly, though once you have the radius, you could calculate both the area (A = πr^2) and the diameter (2r) manually.