# LOG10

Formulas / LOG10
Calculate the base 10 logarithm of a number.
`LOG10(number)`
• number - required, positive real number to logarithm

## Examples

• `=LOG10(100)`

The LOG10 function is used to calculate the base-10 logarithm of a positive number. The syntax for the LOG10 function is . For example, if you want to calculate the base-10 logarithm of 100, you would enter the preceding formula into a cell in Sourcetable. This will return the result of 2.

• `=LOG10(1000)`

To calculate the base-10 logarithm of 1000, you would use this formula. This will return the result of 3.

• `=LOG10(-100)`

The LOG10 function only accepts positive numbers as arguments, so entering a negative number will produce an error. For example, if you enter the above formula into a cell in Sourcetable, it will return an error.

• `=LOG10(A1)`

You can also use the LOG10 function to calculate the base-10 logarithm of a cell reference. For example, if cell A1 contains the number 100, you can enter the formula above into a cell to calculate the base-10 logarithm of the value in cell A1.

## Summary

The LOG10 function is used to calculate the base 10 logarithm of a number and is helpful when working with large numbers. It can also be used to change the base of a number in a formula.

• The LOG10 function takes a number argument as a required parameter, which can be positive or negative.
• The LOG10 function returns the base 10 logarithm of the number.