PHP: Calculate the percentage of a number.

This is a short guide on how to calculate the percentage of a given number in PHP. For example: What is 25% of 100? Or what is 10% of 728?

In this code snippet, I have put each calculation on its own separate line, just to make the math a little clearer:

A quick summary of what we did:

  1. We used the number 928 for example purposes.
  2. We specified that we wanted to get 25% of 928.
  3. We converted our percentage value into a decimal number by dividing it by 100. This turns 25 into 0.25.
  4. We then multipliedĀ 0.25 by 928.
  5. The end result is 232, which means that 25% of 928 is 232.


If you’re looking for a simple PHP function to use in your projects, then you can use the following:

I’m using the same example figures, just to demonstrate that the result is the same. As you can see, theĀ calculation can be done with one simple line of code.

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