400 squared

400² = 400 × 400 = 160,000

To square a number, multiply it by itself. 400 squared is written 400² or 400^2, and the answer is 160,000.

How to work out 400 squared

Direct: 400 × 400 = 160,000.
From the previous square: 399² = 159,201, and 400² = 159,201 + (2 × 400 − 1) = 159,201 + 799 = 160,000.

Related

400 cubed = 64,000,000
The square root of 160,000 is 400, so 160,000 is a perfect square.

Squares near 400

Number	Squared
150	22,500
200	40,000
250	62,500
300	90,000
500	250,000
1000	1,000,000

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