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Circle From 3 Points Calculator

Enter the coordinates of three points to find the circle through them.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Any three points that don't all lie on a single line define exactly one circle — their circumcircle — found by intersecting the perpendicular bisectors of any two chords connecting the points, or equivalently by solving the general equation of a circle for its center and radius.

This is the same geometric construction used to find a triangle's circumcenter. It's used in geometry coursework, in CAD/CNC work where an arc needs to be fitted through measured points, in surveying, and in computer-graphics or CAM algorithms that need to reconstruct a circular arc from a handful of sampled points.

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