Last updated: June 2026
Calculate the outside covering area of common solids.
188.4956 cm²
SA = 2pi r^2 + 2pi rh
Base area
56.5487 cm²
Lateral area
131.9469 cm²
Total
188.4956 cm²
Formula: SA = 2pi r^2 + 2pi rh
Substitution: SA = 2pi x 3 x 7 + 2pi x 3^2
Surface area measures the outside covering of a 3D shape in square units. Volume measures the space inside in cubic units.
A net unfolds a 3D shape into flat faces. Adding the area of each face gives total surface area.
Surface area is used for painting, wrapping, packaging, insulation, coating, fabric, and material estimates.
The Surface Area Calculator finds the outside area of common 3D shapes such as cubes, rectangular prisms, cylinders, cones, spheres, pyramids, triangular prisms, capsules, and toruses. It is useful for packaging, painting, wrapping, material estimates, and geometry revision.
Surface area adds the areas of all outside faces or curved surfaces. The exact formula depends on the selected 3D shape.
Input: s = 4
Calculation: SA = 6 x 4^2
Result: 96 square units
Input: r = 3, h = 7
Calculation: SA = 2pi r^2 + 2pi rh
Result: About 188.5 square units
Surface area measures the outside covering of a 3D object. Volume measures the space inside it. A box can have the same volume as another box but a different surface area.
This calculator is for educational and planning use. For construction, manufacturing, surveying, engineering, or safety-critical work, confirm dimensions, tolerances, and rounding rules with the appropriate professional method or specification.
Use any length unit you like, but keep every length in the same unit. If you enter metres, area is in square metres and surface area is also in square metres.
Calculations involving pi, square roots, or curved shapes often produce irrational numbers. The calculator rounds the displayed decimal result.
Area measures a flat 2D region. Surface area measures the total outside area of a 3D object.
Yes. They are useful for checking answers and understanding formulas, but you should still show the working required by your class or exam.
No. Regular polygon formulas assume equal sides and equal angles. Irregular polygons usually need to be split into simpler shapes.
This calculator is designed to help you understand the likely number before you make a decision or start an application.
Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.
Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.
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