Geometry & Trigonometry
Calculate areas, volumes, angles, distances, and coordinates for any 2D or 3D shape, from triangles to polyhedra.
Cartesian to Polar Coordinates: Conversion Formulas & Quadrant Analysis
Tetrahedron Volume Calculator: Formulas for Regular & Irregular Solids
Torus Volume Calculator: Formulas, Surface Area & O-Ring Design
Sphere Surface Area Calculator: SA:V Ratio, Volume & Engineering Formulas
Sphere Volume Calculator — Surface Area, Mass & Capacity
Spherical Coordinates Calculator — Convert Cartesian, Spherical & Cylindrical (ISO 80000-2)
Pythagorean Theorem Calculator: Sides, Angles & Triangle Metrics
Hexagonal Pyramid Volume & Surface Area — Formulas for Structural Design
Regular Hexagon Calculator: Area, Diagonals & Apothem Formulas
Golden Ratio Calculator — Phi-Based Proportioning for Design
Ellipse Circumference Calculator: Perimeter Formulas, Properties & Analysis
Ellipse Area Calculator: Formulas, Eccentricity & Perimeter Guide
Dot Product Calculator: Vectors, Cosine Similarity & Angle Analysis
Rectangle Diagonal Calculator: Formulas, Angles & Circumradius
Regular Decagon Area Calculator: Formulas, Golden Ratio & Engineering Use