27 squared

27² = 27 × 27 = 729

To square a number, multiply it by itself. 27 squared is written 27² or 27^2, and the answer is 729.

How to work out 27 squared

Direct: 27 × 27 = 729.
From the previous square: 26² = 676, and 27² = 676 + (2 × 27 − 1) = 676 + 53 = 729.
Split the number: 27 = 20 + 7, so 27² = 20² + 2 × 20 × 7 + 7² = 400 + 280 + 49 = 729.

Related

27 cubed = 19,683
The square root of 729 is 27, so 729 is a perfect square.

Squares near 27

Number	Squared
23	529
24	576
25	625
26	676
28	784
29	841
30	900
31	961

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