Surface Area Calculator
MathematicsCalculate total and lateral surface area for 3D geometric solids including spheres, cylinders, cones, cubes, rectangular prisms, and pyramids for material and coating estimations.
About this calculator
Estimating external surface area is essential when ordering sheet metal for ductwork, calculating heat dissipation in radiators, or purchasing paint and industrial coatings for tanks and containers.
This calculator supports 6 primary 3D solids: spheres, cylinders, rectangular prisms, cubes, cones, and square pyramids. It provides both total enclosed area and lateral (side-only) area for open-ended or hollow structures.
How It Works & Formula
Geometric surface equations sum all exterior faces: Sphere A = 4πr²; Cylinder A = 2πr² + 2πrh; Cone A = πr(r + √(r² + h²)); Rectangular Box A = 2(lw + lh + wh); Cube A = 6s².
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