90 squared

90² = 90 × 90 = 8,100

To square a number, multiply it by itself. 90 squared is written 90² or 90^2, and the answer is 8,100.

How to work out 90 squared

Direct: 90 × 90 = 8,100.
From the previous square: 89² = 7,921, and 90² = 7,921 + (2 × 90 − 1) = 7,921 + 179 = 8,100.

Related

90 cubed = 729,000
The square root of 8,100 is 90, so 8,100 is a perfect square.

Squares near 90

Number	Squared
86	7,396
87	7,569
88	7,744
89	7,921
91	8,281
92	8,464
93	8,649
94	8,836

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