21 cubed

21³ = 21 × 21 × 21 = 9,261

To cube a number, multiply it by itself twice. 21 cubed is written 21³ or 21^3, and the answer is 9,261.

How to work out 21 cubed

• Step 1: 21 × 21 = 441 (that is 21 squared).
• Step 2: 441 × 21 = 9,261.

Related

• The cube root of 9,261 is 21. Try the root calculator for other cube roots.
• 21 squared = 441; 21 to the power of 4 = 194,481.

Cubes near 21

Need another number? Use the exponent calculator or see all squares and cubes.