Surface Area of a Cube Calculator

Your details

Choose which measurement you already have. The calculator will derive everything else from it.
Select the unit system. All outputs use the same unit.
The length of one edge of the cube. All edges are equal.
cm
Surface Area
150cm²

Total area of all six square faces (SA = 6a²)

Side Length (a)5cm
Volume (V)125cm³
Face Diagonal (f)7.0711cm
Space Diagonal (d)8.6603cm
Area of One Face25cm²

Surface area: 150.00 cm² - Side: 5.0000 cm

  • The cube has a side length of 5.0000 cm and six identical square faces, each with an area of 25.0000 cm².
  • The total surface area is 150.0000 cm² and the volume is 125.0000 cm³.
  • The surface-area-to-volume ratio is 1.2000 per cm, which means 1.2000 square units of surface for every cubic unit of interior space. Smaller cubes have a higher ratio, which is why small objects cool or heat faster than large ones.
  • The space diagonal (8.6603 cm) is the longest straight line that fits inside this cube.

Next stepTo find how much paint, wrapping paper, or sheet material you need for a cube, use the surface area. For packing or filling problems, use the volume.

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