Surface Area Calculator
Interactive calculators with formulas and unit support
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Surface Area Calculator
Use the calculators below to calculate the surface area of several common shapes.
🟢Sphere Surface Area
Formula
surface area = 4 × π × r²
Result
🧁Cone Surface Area
Formula
surface area = π r (r + √(r² + h²))
Result
🧊Cube Surface Area
Formula
surface area = 6 a²
Result
🛢️Cylinder Surface Area
Formula
surface area = 2πr(r + h)
Result
📦Rectangular Tank Surface Area
Formula
surface area = 2lw + 2lh + 2wh
Result
💊Capsule Surface Area
Formula
surface area = 4πr² + 2πrh
Result
🟢Spherical Cap Surface Area
Formula
spherical cap SA = 2πRh; base SA = πr²; total solid sphere SA = 2πRh + πr²
Result
🔺Conical Frustum Surface Area
Formula
total SA = π(R² + r²) + π(R + r) √((R − r)² + h²)
Result
🥚Ellipsoid Surface Area
Formula
SA ≈ 4π^1.6 × √((a^1.6 b^1.6 + a^1.6 c^1.6 + b^1.6 c^1.6)/3)
Result
🔺Square Pyramid Surface Area
Formula
total SA = a^2 + 2a * sqrt((a/2)^2 + h^2)
Result
Common Area Units
| Unit | meter² |
|---|---|
| kilometer² | 1,000,000 |
| centimeter² | 0.0001 |
| millimeter² | 0.000001 |
| micrometer² | 0.000000000001 |
| hectare | 10,000 |
| mile² | 2,589,990 |
| yard² | 0.83613 |
| foot² | 0.092903 |
| inch² | 0.00064516 |
| acre | 4,046.86 |