Surface Area Calculator
Calculate total and lateral surface area of 3D shapes.
Select shape
Visualization
Total Surface Area
150
cm²
Formula
SA = 6a² = 6 × 5² = 150
Conversions
15000
mm²
150
cm²
0.015
m²
23.25
in²
0.1615
ft²
What is Surface Area?
Surface area is the sum of all the areas of the faces of a three-dimensional object.
Common Formulas
Cube: 6a². Sphere: 4πr². Cylinder: 2πr² + 2πrh. Each shape has its specific formula.
Applications
Used to calculate paint quantity, wrapping paper, packaging material, and in heat transfer.
Preguntas Frecuentes
What's the difference between lateral and total area?
Lateral area excludes the bases; total area includes all surfaces.
Why is surface area important?
It determines how much material is needed to cover an object and affects heat transfer.
How do I calculate area of an irregular shape?
Break it into simple shapes, calculate each area, and sum the results.