Everyday utility

Surface Area Calculator

Calculate the total surface area of common 3D shapes including sphere, cube, cylinder, cone, and rectangular prism. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
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How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Surface area formulas: Cube = 6s²; Sphere = 4πr²; Cylinder = 2πr(r+h); Cone = πr(r+l) where l=slant height; Rectangular prism = 2(lw+lh+wh).

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What is surface area used for?

Surface area is used to calculate material needed to cover or coat an object (paint, wrapping), heat transfer rates, and in chemistry for reaction rate calculations.