Square Root of 18
The square root of 18 is approximately 4.242641, or exactly 3√2 in simplified radical form. No, 18 is not a perfect square. Its square root is irrational and never terminates or repeats as a decimal.
√18
4.242641
Simplified Radical Form
3√2
Perfect Square
No
√18 is irrational — its decimal form (4.242641) never terminates or repeats. The simplified radical form (3√2) is the exact value.
Frequently Asked Questions
What is the square root of 18?
The square root of 18 is approximately 4.242641, or exactly 3√2 in simplified radical form.
Is 18 a perfect square?
No, 18 is not a perfect square. Its square root is irrational and never terminates or repeats as a decimal.
More Number Theory
- Square Root Calculator (look up any number)
- Factors of 18
- GCF Calculator
- LCM Calculator