Cube Surface Area Calculator

Where s is the side length.

Calculate the surface area of a cube with side length 7 cm:

Result: 294 cm²

1. Enter the side length of the cube
2. Click "Calculate" to see the surface area

• Volume: $s^3$
• Space diagonal: $s\\\\sqrt{3}$
• Face diagonal: $s\\\\sqrt{2}$

• Packaging and shipping
• Room calculations (square rooms)
• Dice and game design
• Construction and architecture

What if I only know the volume? Find side: $s = \\\\sqrt[3]{\\\\text{volume}}$, then use $6s^2$.

How is this different from volume? Surface area is the total area of all 6 faces (2D); volume is the space inside (3D).

What about an open cube? Subtract the area of the missing face(s).

Can I calculate from the space diagonal? Yes: $s = \\\\frac{d}{\\\\sqrt{3}}$, then use $6s^2$.