Negative Log Calculator

Enter value and click on calculate. Result will be displayed.
Enter value (x) :
Log base (b) :
Result:

Result :

A Negative Log Calculator computes the negative logarithm (-log) of a number, usually in base 10 (common log) or base e (natural log, ln).

Why Use a Negative Log Calculator?

  • Common in science and engineering, especially in pH calculations in chemistry.
  • Used in signal processing, biology, and finance to express small values in a more manageable way.
  • Helps in data scaling and statistical transformations.

How Does It Work?

For a given number x, the calculator finds:

-log(x) = − logb​ (x)

where b is the base (commonly 10 or e).

Examples:

  • pH calculation: pH = − log10​ [H+]
  • Sound intensity (decibels): dB = − log10​ (I/I0​ )

When to Use It?

  • Chemistry: To find pH levels of acids and bases.
  • Physics: In sound intensity or signal strength measurements.
  • Finance: In logarithmic returns calculations.