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Surface Area Calculator
Calculate surface area of sphere, cube, cylinder, cone, and rectangular prism. Includes all surface area formulas with step-by-step solutions.
1x² − 5x + 6 = 0
Discriminant = 1
two real roots
x = (−b ± √(b²−4ac)) / 2a
x₁ = 3
x₂ = 2
How to Use the Surface Area Calculator
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
What is the surface area of a sphere?
Surface area = 4πr². For a sphere with radius 5: SA = 4π(25) ≈ 314.16 square units.