Geometry Calculators & Solvers

Explore our collection of accurate online tools for two-dimensional plane figures and three-dimensional geometric solids. Compute areas, perimeters, surface boundaries, and volumes with full mathematical working.

3D Geometry Calculators (Volume & Surface Area)

Solvers for solid shapes occupying three dimensions of physical space:

V
Sphere Volume Calculator
Calculate volume from radius or diameter: V = (4/3)πr³.
Open Calculator →
A
Sphere Surface Area
Compute spherical boundary area: A = 4πr².
Open Calculator →
■
Cube Volume & Area
Volume and surface area of regular cubes: V = a³.
Open Calculator →
▮
Cylinder Volume & Area
Volume and surface area of circular cylinders: V = πr²h.
Open Calculator →
▲
Cone Volume & Area
Find volume and slant height of circular cones: V = (1/3)πr²h.
Open Calculator →
½
Hemisphere Solvers
Volume and total surface area for half-spheres: V = (2/3)πr³.
Open Calculator →

2D Geometry Calculators (Area & Perimeter)

Tools for two-dimensional plane geometry:

▣
Area Calculators Hub
Find areas for circles, triangles, rectangles, trapezoids, and polygons.
Explore Area Tools →
↻
Perimeter Calculators Hub
Compute perimeters and circumferences for 2D plane boundaries.
Explore Perimeter Tools →
⇆
Unit Conversion Tool
Convert between length, area, and volumetric metric and imperial units.
Open Converter →

Frequently Asked Questions

What is the difference between 2D and 3D geometry?

2D geometry deals with flat plane figures possessing length and width (such as circles, squares, and triangles) measured in area and perimeter. 3D geometry deals with solid figures possessing depth or height (such as spheres, cubes, and cylinders) measured in volume and surface area.

What is the connection between circle area and sphere surface area?

The surface area of a sphere (4πr²) is exactly four times the area of a circle with the same radius (πr²).

Where should I start for sphere calculations?

Visit our flagship Sphere Volume Formula guide or use the Sphere Volume Calculator for instant solutions.