Geometry Calculator
Calculate measurements for common 2D and 3D shapes.
Area
50cm²
- Shape
- Rectangle
- Additional result
- Perimeter: 30 cm
What this calculator does
Choose a shape and calculate its area, perimeter, surface area, or volume from relevant dimensions.
Inputs and what they mean
- Shape
- — choice value.
- Length / radius / base
- — number value.
- Width / height
- — number value.
- Depth
- — number value.
- Unit
- — choice value.
How to use it
- Enter the requested values.
- Choose the calculation mode when available.
- Review the result and supporting breakdown.
Formula
Uses standard Euclidean area, perimeter, surface-area, and volume formulas for the selected shape.
Worked example
10 × 5 rectangle
Area is 50 square centimetres and perimeter is 30 centimetres.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.
Common questions
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