PepsTools

Everyday Tools

Percentage Calculator

Find a percentage of a number, what percent one number is of another, the change between two numbers, or a value increased or decreased by a percent.

How to use it

Choose the calculation, enter X and Y, and calculate. Division by zero is refused. Empty input is reported as a missing number rather than treated as zero.

Example

15% of 80 is 12. The other modes use the same two boxes with different meanings, which the menu names.

Input

15, 80

Result

12

How it works

Percent of multiplies Y by X divided by 100. Ratio divides X by Y and multiplies by 100. Change divides the difference by the starting value. Increase and decrease add or subtract X percent of Y. Results are rounded to six decimal places and trailing zeros are removed.

Common errors

  • The whole value is zero A ratio needs a non-zero whole value. The page says so instead of showing infinity.
  • The starting value is zero Percentage change from zero is undefined here.
  • You expected a fraction The result is a decimal number, not a reduced fraction.

Limitations

The calculator does not do compound interest schedules or tax tables. Very long numbers are rejected. Rounding at six decimal places can hide a smaller remainder.

Privacy

The text you paste is processed in your browser. PepsTools does not receive it, store it, or send it to another service.

Questions

Which box is the percent?

X is the percent in the “percent of”, increase, and decrease modes. The menu states the role of each box.