# Square Root

The square root of a number is a value that, when multiplied by itself, gives the number. The SQRT function in Excel returns the square root of a number.

1. First, to square a number, multiply the number by itself. For example, 4 * 4 = 16 or 4^2 = 16. Note: to insert a caret ^ symbol, press SHIFT + 6.

2. The square root of 16 is 4. 3. Instead of using the SQRT function, you could also use an exponent of 1/2. Don't forget the parentheses. 4. If a number is negative, the SQRT function returns the #NUM! error. 5. You can use the ABS function to remove the minus sign (-) from a negative number. Excel has no built-in function to calculate the nth root of a number. To calculate the nth root of a number, simply raise that number to the power of 1/n.

6. For example, 5 * 5 * 5 or 5^3 is 5 raised to the third power. 7. The cube root of 125 is 5. 8. For example, 2 * 2 * 2 * 2 * 2 * 2 or 2^6 is 2 raised to the sixth power. 9. The sixth root of 64 is 2. Go to Next Chapter: Ribbon   |   Become an Excel Pro: 300 Examples