Polygon Centroid Calculator - Online Center of Mass
Find the centroid (center of mass) of any convex polygon by entering vertex coordinates. Useful for physics and design.
UD5 Toolkit
Find the centroid (center of mass) of any convex polygon by entering vertex coordinates. Useful for physics and design.
Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.
Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.