Square Root Calculator › Square root of 16
Square Root of 16
√16 = 4
16 is a perfect square: 4 × 4 = 16. Its square root is the whole number 4.
| Number | 16 |
| Square root (decimal) | 4 |
| Simplified radical | 4 |
| Perfect square? | Yes |
| Rational? | Yes |
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Prime factorization of 16
16 = 2^4. This is what determines the simplified radical: for √16 you pull out one copy of any prime that appears twice.
Every prime appears an even number of times, which is exactly why 16 is a perfect square and √16 = 4 is a whole number.
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Frequently asked questions
Is 16 a perfect square?
Yes. 16 is a perfect square because 4 × 4 = 16, so √16 = 4.
What is the square root of 16 in simplest radical form?
√16 simplifies to the whole number 4.