CalcOS

Geometry Calculator

Live
Parameters
Radius. Distance from the center to the outer edge of a circle/sphere.
5
0.0110,000
Shape:Circle
Calculation:Area
Formula:
A=πr2A = \pi r^2
Units:square units (units²)
Analytics Dashboard
Circle Area
78.5398
Circumference31.4159 linear units
Result Interpretation

The calculated area of the circle is 78.5398 square units.

Mathematical Explanation
A=πr2A = \pi r^2

Geometric parameters calculated.

How to Use the Geometry Calculator

Model and solve dimensions for circle, rectangle, sphere, cylinder, cone, and cube shapes.

Input variables:
  • Select Shape: Select Shape
  • What would you like to calculate?: What to calculate for Circle
  • What would you like to calculate?: What to calculate for Rectangle
  • What would you like to calculate?: What to calculate for Sphere
  • What would you like to calculate?: What to calculate for Cylinder
  • What would you like to calculate?: What to calculate for Cone
  • What would you like to calculate?: What to calculate for Cube
  • Radius (r): Radius (r)
  • Width (w): Width (w)
  • Length (l): Length (l)
  • Height (h): Height (h)
  • Side length (s): Side length (s)

Geometry Solver: Solving Areas, Perimeters, & Volumes

A comprehensive reference guide for circles, rectangles, spheres, and cylinders with standard visual derivations.

Read Full Guide →