Area & Volume Calculator
Calculate area and volume for common 2D shapes and 3D solids.
About This Tool
Free area and volume calculator online — calculate the area and volume of common 2D shapes and 3D solids: circle, rectangle, triangle, trapezoid, square, parallelogram, ellipse, sphere, cube, cylinder, cone, and rectangular prism. Enter the relevant dimensions and get the result instantly. Used by students for geometry homework, architects and interior designers for room area calculations, engineers for structural calculations, DIY renovators estimating paint or flooring quantities, and scientists for lab volume calculations. All formulas are shown alongside results so you can verify the calculation.
How to Use
- 1
Select a shape
Choose the 2D shape (area) or 3D solid (volume) you need to calculate.
- 2
Enter dimensions
Input the relevant measurements (radius, length, width, height, etc.) in your preferred units.
- 3
Read the result
The area or volume appears instantly with the formula used.