This free online percentage calculator can calculate percentages the following three ways.

**1.** What percentage is one number of another number.

**2.** What unknown number is a given percentage of another number.

**3.** What unknown number is a given number a given percentage of.

Plus, unlike other online percentage calculators, this percent calculator allows you to choose the decimal rounding, explains how it arrived at the given result, and shows a visual representation of the result in a pie chart.

#### Other Percent-Related Calculators

- Percent Off Calculator for calculating the sale price from the regular price and markdown percentage -- with our without sales tax.
- Percentage Change Calculator for calculating the percent change between one number and another number.

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