Cube Surface Area Calculator
Calculate the surface area of a cube by entering the side length. A cube has 6 equal square faces.
📦 Cube Surface Area
Formula
Cube Surface Area Formula
Surface Area
A cube has 6 identical square faces, each with area s²
Volume
Volume is the side length cubed
Face Diagonal
Diagonal across a face of the cube
Space Diagonal
Diagonal through the center of the cube
Cube Surface Area Examples
Example 1: Small Cube
Given: Side length = 3 cm
Formula: SA = 6s²
Solution: SA = 6 × 3² = 6 × 9 = 54 cm²
Example 2: Medium Cube
Given: Side length = 5 cm
Formula: SA = 6s²
Solution: SA = 6 × 5² = 6 × 25 = 150 cm²
Example 3: Large Cube
Given: Side length = 10 cm
Formula: SA = 6s²
Solution: SA = 6 × 10² = 6 × 100 = 600 cm²
Cube Surface Area FAQ
What is a cube?
A cube is a three-dimensional shape with 6 identical square faces. All edges are equal in length, and all angles are 90 degrees.
How do you calculate cube surface area?
To find the surface area of a cube, use the formula SA = 6s², where s is the side length. This accounts for all 6 square faces.
What's the difference between surface area and volume?
Surface area measures the total area of all faces (in square units), while volume measures the space inside (in cubic units).
Why is the cube formula 6s²?
A cube has 6 faces, each being a square with area s². So the total surface area is 6 × s² = 6s².