Surface Area of Cube Calculator

Enter the edge length to calculate a cube’s surface area instantly.

Edge Length

About Surface Area of Cube

The Surface Area of Cube Calculator is a free, easy-to-use tool for finding the total area of all six faces of a cube. Whether you’re a student, teacher, or professional in architecture, design, or engineering, you’ll get quick and accurate results in a click.

What is a Cube?

A cube is a 3D solid with six equal square faces and equal edge lengths. Common examples are dice, Rubik’s cubes, and ice cubes. The surface area is the sum of the areas of all faces.

Where cubes show up:

Games – Dice and board game pieces.

Puzzles – Rubik’s cubes and brain teasers.

Everyday Use – Ice cubes in drinks.

Architecture & Design – Building blocks and models.

Formula for Surface Area of a Cube

Use the standard formula:

Surface Area = 6 × a²

Where a is the side (edge) length.

If you know the body diagonal d instead:

Surface Area = 3 × d²

Example Calculations

➡️ Using Side Length

If a = 5 cm:

Surface Area = 6 × (5²)
= 6 × 25
= 150 cm²

➡️ Using Diagonal

If d = 8.66 cm:

Surface Area = 3 × (8.66²)
= 3 × 75
≈ 225 cm²

Features of the Surface Area of Cube Calculator:

Quick input for side length or diagonal

Supports cm², m², in², ft², etc.

Instant and precise results

Works on mobile, tablet, and desktop

100% free with no signup

Ideal For:

Math and geometry students

Teachers and educators

Architects and engineers

3D modelers and designers

Everyday measurements

Calculate cube surface areas with ease — fast, accurate, and beginner-friendly.