Surface Area Calculator
Surface area of common 3D shapes.
Enter your values
Results update instantly as you type — no submit needed.
Results
- Surface area
- 248
- Volume
- 240
- Surface to volume ratio
- 1.03333
- Shape
- Rectangular box
Quick answer
Surface area is the total area of all faces or curved surfaces enclosing a solid.
How to use the Surface Area Calculator
- 1Choose the solid shape.
- 2Enter the dimensions it needs (radius uses the first field).
- 3Read area and volume.
Frequently asked questions
Why does surface to volume ratio matter?
It drives heat loss, drying and reaction rates — small objects lose heat fastest.
Which fields do spheres use?
Only the radius field.