Surface Area Calculator
Surface area of common 3D shapes.
Reviewed by James Whitfield · How we check our maths
Your values
ⓘ Live results
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.
Worked example
Worked example
Using the values the calculator loads with.
Inputs
- ShapeRectangular box
- Length / radius6
- Width4
- Height10
Result
- Surface area248
- Volume240
- Surface to volume ratio1.03333
- ShapeRectangular box
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.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error