Circle equation calculator

This calculator can find the center and radius of a circle given its equation in standard or general form. Also, it can find equation of a circle given its center and radius. The calculator will generate a step by step explanations and circle graph.

Find center and radius Find circle equation

circle equation ⇒ center and radius
help ↓↓ examples ↓↓

Find the center and radius of the circle having the equation:

)² + (y

)² =

x² + y²

= 0

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Find approximate solution

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Circle equation calculator

center and radius ⇒ circle equation
help ↓↓ examples ↓↓

Find the equation of a circle in form, with a center at C( , )

and P( , ).

Settings:

Hide graph

Find approximate solution

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Examples

ex 1:

Find the center and the radius of the circle $(x - 3)^2 + (y + 2)^2 = 16$

ex 2:

Find the center and the radius of the circle $x^2 + y^2 + 2x - 3y - \frac{3}{4} = 0 $

ex 3:

Find the equation of a circle in standard form, with a center at $C(-3,4)$ and passing through the point $P(1,2)$.

ex 4:

Find the equation of a circle in standard form, with a center at $C \left(\frac{1}{2}, -\frac{3}{2} \right)$ and a radius of $ r = 5$.

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