Circle Equation Calculator

    Find circle equation from center and radius

    Formula

    (x-h)² + (y-k)² = r²

    Standard form of a circle with center (h,k) and radius r.

    Examples

    Center (3,2), r=5

    (x-3)²+(y-2)²=25.

    Frequently Asked Questions

    About Circle Equation

    Find circle equation from center and radius.