# Geometry Calculator

> Calculate measurements for common 2D and 3D shapes.

Page: https://freecalculator.tech/tools/geometry-calculator

## How do I find the area of a shape?

Each shape has its own area and perimeter formula, applied to the measurements you enter.

## Formula

Uses standard Euclidean area, perimeter, surface-area, and volume formulas for the selected shape.

- Uses standard Euclidean area, perimeter, surface-area, and volume formulas for the selected shape.
- Inputs used: Shape, Length / radius / base, Width / height, Depth, Unit.
- Edge handling: Length / radius / base is required.; Length / radius / base must be greater than zero.; Width / height is required.; Width / height must be greater than zero.; Depth is required..

## Inputs

- Shape
- Length / radius / base
- Width / height
- Depth
- Unit

## Worked example: 10 × 5 rectangle

Area is 50 square centimetres and perimeter is 30 centimetres.
1. Start with Shape: rectangle, Length / radius / base: 10, Width / height: 5, Depth: 3, Unit: cm.
2. Apply the method: Uses standard Euclidean area, perimeter, surface-area, and volume formulas for the selected shape.
3. Area is 50 square centimetres and perimeter is 30 centimetres.

## Common questions

### How do I find the area of a shape?

Each shape has its own area and perimeter formula, applied to the measurements you enter. Check the formula, example, and limitations on this page before using the result for a real math decision.

### What triangle height is required?

Enter the perpendicular height from the base. Check the formula, example, and limitations on this page before using the result for a real math decision.

### Does changing unit convert existing values?

No. The entered dimensions are interpreted in the selected unit.

### How do I use the Geometry Calculator?

Enter the required values for Shape, Length / radius / base, Width / height, Depth, Unit. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Geometry Calculator use?

Uses standard Euclidean area, perimeter, surface-area, and volume formulas for the selected shape. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

### Can the Geometry Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this geometry calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Cite this page

- APA: Free Calculator. (n.d.). Geometry Calculator. https://freecalculator.tech/tools/geometry-calculator
- MLA: "Geometry Calculator." Free Calculator, https://freecalculator.tech/tools/geometry-calculator.
- Link: Geometry Calculator — Free Calculator, https://freecalculator.tech/tools/geometry-calculator