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Geometry: area and volume

Calculate area for rectangles, circles and triangles, or volume for boxes, cylinders and spheres. Enter all dimensions in metres. Results use m², m³ or metres for perimeter.

Geometry: area and volume

Calculate area for rectangles, circles and triangles, or volume for boxes, cylinders and spheres. Enter all dimensions in metres. Results use m², m³ or metres for perimeter.

Your details
m
m

Results update instantly

Results

Example using default values

Area: rectangle l×w, circle πr², triangle base×perpendicular height/2. Volume: box l×w×h, cylinder πr²h, sphere 4πr³/3. Circle circumference is 2πr. Material allowances and structural strength are excluded. Triangle perimeter cannot be determined from base and height alone.

Area
12 m²

Estimate, not a legal decision

Read methodology

Use the result as decision support and planning help. For high-stakes choices, confirm the details with the relevant authority, lender, employer, or adviser.

Result details

Volume
—
Perimeter
14 m
Analysis & guidance

  • Method

    Calculate area for rectangles, circles and triangles, or volume for boxes, cylinders and spheres. Enter all dimensions in metres. Results use m², m³ or metres for perimeter.

  • Example

    A 3 × 4 m rectangle has an area of 12 m² and perimeter of 14 m. A 3 × 4 × 5 m box has a volume of 60 m³. A cylinder with radius 2 m and height 3 m has volume 12π ≈ 37.70 m³.

  • Limitations

    Area: rectangle l×w, circle πr², triangle base×perpendicular height/2. Volume: box l×w×h, cylinder πr²h, sphere 4πr³/3. Circle circumference is 2πr. Material allowances and structural strength are excluded. Triangle perimeter cannot be determined from base and height alone.

About this calculator

Geometry: area and volume

Method

Calculate area for rectangles, circles and triangles, or volume for boxes, cylinders and spheres. Enter all dimensions in metres. Results use m², m³ or metres for perimeter.

Example

A 3 × 4 m rectangle has an area of 12 m² and perimeter of 14 m. A 3 × 4 × 5 m box has a volume of 60 m³. A cylinder with radius 2 m and height 3 m has volume 12π ≈ 37.70 m³.

Limitations

Area: rectangle l×w, circle πr², triangle base×perpendicular height/2. Volume: box l×w×h, cylinder πr²h, sphere 4πr³/3. Circle circumference is 2πr. Material allowances and structural strength are excluded. Triangle perimeter cannot be determined from base and height alone. Recalculate when your circumstances change.

How the calculation works

Method

Calculate area for rectangles, circles and triangles, or volume for boxes, cylinders and spheres. Enter all dimensions in metres. Results use m², m³ or metres for perimeter.

Example

A 3 × 4 m rectangle has an area of 12 m² and perimeter of 14 m. A 3 × 4 × 5 m box has a volume of 60 m³. A cylinder with radius 2 m and height 3 m has volume 12π ≈ 37.70 m³.

Limitations

Area: rectangle l×w, circle πr², triangle base×perpendicular height/2. Volume: box l×w×h, cylinder πr²h, sphere 4πr³/3. Circle circumference is 2πr. Material allowances and structural strength are excluded. Triangle perimeter cannot be determined from base and height alone.

How to read this calculator

These results are meant as guidance. They are based on rules, assumptions, and simplified models that can differ from your exact real-world situation.

Estimate, not a legal decision

Use the result as decision support and planning help. For high-stakes choices, confirm the details with the relevant authority, lender, employer, or adviser.

Methodology

Each calculator uses defined inputs, assumptions, and logic. We explain the broader approach on the methodology page.

Read methodology

Sources and updates

Important calculators should be traceable back to official rules, public guidance, or other clearly stated references.

Read about sources

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