CalculynQuick answer
A 5×4×3 box has surface area 2(20+15+12) = 94 square units.
How it works
Total area of all outer surfaces. For a cylinder the first field is the radius; for a sphere only the radius is needed.
Formula
Box: 2(LW+LH+WH) · Cylinder: 2πr(r+h) · Sphere: 4πr²
Assumptions & limitations
- Results are rounded for display.
Frequently asked questions
Is this the same as area?
Surface area is the total of every face of a 3D object; 'area' usually means one flat surface.