Cube Calculator x³
Find the cubed value of a number n. Enter positive or negative whole numbers, decimals, or E notation.
Result will appear here
A civil engineer with a strong love for numbers, teaching, and building practical digital tools. With a Bachelor’s in Civil Engineering, a postgraduate degree in Project Management, and 12 years of teaching experience, he blends technical expertise with creativity. His passion for math and web development drives him to create clear, useful calculators that simplify everyday problem-solving.
What is a Cubed Number?
Any number n with an exponent of 3 is written as n³. You pronounce it as "n cubed," or "n to the third power." To get the cube of a number multiply it by itself 3 times. Therefore the cube formula is n³ = n × n × n.
What is a Perfect Cube?
A perfect cube results when you cube an integer, or a whole number without decimals or fractions. For example, 3 cubed is written as 3³ and 3³ = 3 × 3 × 3 = 27. Since 3 is an integer, 27 is a perfect cube.
Cubing Negative Numbers
When you cube a negative number the result will always be a negative number. The placement of parentheses affects the interpretation:
- -2³ means -(2 × 2 × 2) = -8
- (-2)³ means (-2 × -2 × -2) = -8
With odd exponents like 3, you always get a negative result when cubing a negative number.