Explanation

What is Surface Area?

Surface area is the total outside area of a 3D object. Here we use a rectangular prism.

What this calculator does

Calculate surface area of a rectangular prism.

Inputs you need

• Length
• Width
• Height

Formula

SA = 2(lw + lh + wh)

Example

For l=10, w=6, h=4:

• Surface area = 248

Quick input set you can try:

• Length: 10
• Width: 6
• Height: 4

FAQ

1) What does this calculator help with? It helps you calculate Surface Area quickly and with consistent formulas.

2) Which formula is used? It uses the standard method shown in the formula section on this page.

3) Can I use decimal values? Yes. Decimal values are supported for most numeric fields.

4) Should I rely on this for final decisions? Use it as a practical estimate, and verify critical decisions with official documents or expert advice.