Last updated: April 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.
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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