Cubing a number means multiplying it by itself three times.
About this calculator
Cubing a number means multiplying it by itself three times. 5³ = 5 × 5 × 5 = 125. (−2)³ = −8 because three negative factors stay negative.
Cubes appear in volume — a cube with edge 5 has volume 5³ = 125 cubic units. Perfect cubes 1, 8, 27, 64, 125 are worth memorizing for quick cube-root checks.
Reverse with the [[cube-root]] calculator. For n² use [[square]]. For general powers try [[exponent]]. For the volume of a cube solid see geometry [[cube]] if listed, or [[volume]].
Common uses
- Compute 5³ = 125 for algebra homework
- Find volume of a cube from edge length
- Check whether a number is a perfect cube
- Evaluate polynomial terms like x³ at a given x
- Verify cube-root inverse operations
Frequently asked questions
What is 5 cubed?
5³ = 5 × 5 × 5 = 125. It is a perfect cube, so ∛125 = 5 exactly.
What is (−2) cubed?
(−2)³ = (−2) × (−2) × (−2) = −8. An odd number of negative factors gives a negative result.
Is cubing the same as multiplying by 3?
No. 5³ = 125 but 5 × 3 = 15. Cubing repeats the base three times; tripling adds three copies once.
How do cubes relate to volume?
A cube with edge length s has volume s³. If volume is 27 cubic units, edge length is ∛27 = 3.