Area & Volume Calculator
Calculate area of 2D shapes and volume of 3D solids.
How to Use the Area & Volume Calculator
This tool calculates the area of 2D shapes and the volume of 3D solids.
- Choose a dimension — select 2D (Area) for flat shapes or 3D (Volume) for solid shapes.
- Pick a shape — click the shape you want to calculate. Available 2D shapes: circle, rectangle, triangle, trapezoid, ellipse, parallelogram. Available 3D shapes: sphere, cube, cylinder, cone, rectangular prism, pyramid.
- Enter measurements — fill in the required fields (radius, width, height, etc.). All values must be non-negative numbers.
- Read the result — the formula and calculated area or volume are displayed instantly.
All calculations run in your browser. No data is sent to any server.
Frequently Asked Questions
What units does this calculator use?
The calculator works with any consistent unit of measurement. If you enter values in centimetres, the result is in square centimetres (area) or cubic centimetres (volume). Just use the same unit for all inputs.
How do I calculate the area of a circle?
Enter the radius of the circle. The area is calculated using the formula A = pi * r^2. For example, a circle with radius 5 has an area of approximately 78.54 square units.
How do I calculate the volume of a sphere?
Enter the radius of the sphere. The volume is calculated using V = (4/3) * pi * r^3. For example, a sphere with radius 3 has a volume of approximately 113.1 cubic units.
What is the difference between a rectangular prism and a cube?
A cube is a special rectangular prism where all three sides (length, width, height) are equal. A rectangular prism can have three different side lengths.
Can I use decimal values?
Yes. You can enter any non-negative decimal number for any measurement. The result will be calculated with up to 6 decimal places of precision.
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