Square root of 243
The square root of 243 is 15.588457 (rounded to 6 decimal places). In simplest radical form it is 9ā3.
Square root of 243
Pick any whole number from 1 to 10,000.
How to work it out
- 1
The square root of 243 is the number that multiplied by itself gives 243.
- 2
243 is between the perfect squares 15Ā² = 225 and 16Ā² = 256, so its square root is between 15 and 16.
- 3
Pull out the biggest square factor: 243 = 81 Ć 3, so
- 4
A calculator, or long division of digits, gives
LaTeX source of the formulas on this page
\[ \sqrt{243} = 9\sqrt{3} \approx 15.588457 \]
\[ \sqrt{243} = \sqrt{81 \times 3} = 9\sqrt{3} \]
\[ \sqrt{243} \approx 15.588457 \]Squares around 243
| Number | Squared |
|---|---|
| 14 | 196 |
| 15 | 225 |
| 16 | 256 |
| 17 | 289 |
Questions
What is the square root of 243?
The square root of 243 is 15.588457 (rounded to 6 decimal places). In simplest radical form it is 9ā3.
Is 243 a perfect square?
No. It lies between 15Ā² = 225 and 16Ā² = 256.
What is 243 squared?
243 Ć 243 = 59049.
What is the square root of 243 rounded to 2 decimals?
15.59.