Use this sphere surface area calculator to compute the surface area of a sphere by entering its radius. Apply the sphere surface area formula for accurate results.
r = radius
π ≈ 3.14159
Multiply 4 by π and square of the radius to find the surface area.
| Radius (r) | Surface Area (A) |
|---|---|
| 1 | 12.566371 |
| 2 | 50.265482 |
| 3 | 113.097336 |
| 4 | 201.061930 |
| 5 | 314.159265 |
1. Square the radius (r²).
2. Multiply by π (~3.14159).
3. Multiply by 4.
4. The result is the sphere's surface area.
This sphere surface area calculator automatically computes the surface area using A = 4 × π × r² with up to six decimal places.
• Spheres have the smallest surface area for a given volume.
• Useful in physics, engineering, and packaging.
• Surface area affects heat transfer and material requirements.
• The Earth and planets are approximately spherical.
• Surface area calculation is fundamental in geometry and calculus.