# Percentage Calculator

## Percentage Calculator is a free online tool to calculate percentages.

Some examples of scientific notation are shown below:

## Example 1: Scientific Notation for Small Numbers

0.000027 = 2.7×10^{-5}

## Example 2: Scientific Notation for Large Numbers

270000 = 2.7×10^{5}

## Formulas of calculations

The formulas of each of the calculations used in our percentage calculator can be seen by clicking the question mark, ? , next to each calculation. A video tutorial on using our calculator as well as a walk through of the calculations and formulas is shown here: **Percentage Calculator** Tutorial.

# Percentage Calculator

Calculate a percent of a value before and after,

or find the percentage change between two values,

and see **how to calculate** each one.