Square Root of 16
The square root of 16 is about 4. Square roots reverse squaring and are essential in geometry and the quadratic formula.
√16 = 4 exactly: 16 is the square of 4, so the table shows the whole truth with no rounding at all. The ladder around it confirms the fit — 9 sits 7 below and 25 sits 9 above, gaps that widen by exactly two at every rung. The geometry backs the number: a square with side 4 covers exactly 16 square units of area, the picture behind every fact on this page. The modular checks agree as well: divided by 9, 16 leaves 7, one of the 0, 1, 4, 7 remainders every square is allowed.
| Expression | Value |
|---|---|
| √16 | 4 |
Frequently asked questions
What is the square root of 16?
The square root of 16 is about 4. It is the number that, multiplied by itself, gives 16.
Is 16 a perfect square?
Yes — 4 × 4 = 16, so 16 is a perfect square and its square root is exact.
What does √ mean?
√ is the radical sign, short for square root. √16 asks: which number times itself equals 16? Here the answer is about 4.