📐 Geometry
Free geometry calculators and tools.
Area of a Circle
Calculate the area of any circle instantly. Enter the radius or diameter and get the area plus circu
Circumference Calculator
Calculate the circumference of any circle from its radius or diameter. Also shows the area. Fast, fr
Pythagorean Theorem
Solve right triangles with the Pythagorean theorem. Find the hypotenuse or a missing side. Enter two
Triangle Area Calculator
Calculate the area of any triangle using base and height, three sides (Heron's formula), or two side
Sphere Volume Calculator
Calculate the volume and surface area of any sphere. Enter the radius or diameter for instant, accur
Cylinder Volume Calculator
Calculate the volume, surface area, and lateral area of any cylinder. Enter radius or diameter and h