Geometry & Shapes Calculators
Geometry calculators for areas, perimeters, volumes, triangles and circles, with proportional diagrams that make the shapes easy to understand.
View all calculatorsTriangle Solver
Visual triangle solving
Circle Calculator
Circle measurements visualized
Area & Perimeter
Shape area & perimeter
Volume Calculator
3D shape volume & surface area
Pythagorean Theorem
Right triangle solver
Coordinate Distance & Midpoint
Distance & midpoint on a grid
Regular Polygon Calculator
Any regular polygon
Ellipse Calculator
Calculate ellipse area, circumference approximation, eccentricity, and foci
Trapezoid Calculator
Solve trapezoid area, height, bases, median, and perimeter
Circle Sector Calculator
Calculate sector area, arc length, chord length, and perimeter
Arc Length Calculator
Solve arc length, radius, or angle for a circular arc
Conic Section Analyzer
Classify and graph a conic from its equation
Hyperbola Properties
Foci, vertices, and asymptotes of a hyperbola
Parabola Focus & Directrix
Focus, directrix, and vertex of a parabola
3D Distance & Midpoint
Distance and midpoint between two 3D points
Plane from 3 Points
Plane equation and normal vector from three points
Line-Plane Intersection
Where a line meets a plane in 3D
Rotation Matrix
2D and 3D rotation matrices from angles
Point in Polygon
Ray-casting point-in-polygon test
Convex Hull
Convex hull of a set of points
Voronoi Diagram
Voronoi regions for a set of points
Sphere & Solid Geometry
Surface area and volume of spheres, cones, and cylinders
Platonic Solids
Faces, edges, vertices, area, and volume of regular solids
Delaunay Triangulation
Triangulate a set of points (dual of Voronoi)
2D Vector Calculator
Add, subtract, and project 2D vectors