Percentage Calculator
Calculate percentages three ways: X% of Y, X is what % of Y, and percentage change from X to Y.
Find what X percent of Y is
X% of Y
Multiply the percentage by the value and divide by 100. Example: 25% of 200 = 50.
X is ?% of Y
Divide the part by the whole and multiply by 100. Example: 50 is 25% of 200.
% Change
Subtract the old value from the new, divide by the old, and multiply by 100.
How to Use Percentage Calculator
Calculate percentages, percentage changes, and percentage differences quickly. Handles all common percentage calculation types.
Select Calculation Type
Choose what-is-X%-of-Y, percentage-change, or percentage-difference mode.
Enter Values
Type the numbers you need for the selected percentage calculation type.
Get Result
The calculator instantly shows the result with the formula used explained.
Common Use Cases
Discount Shopping
Calculate sale prices and savings when stores advertise percentage-off discounts.
Grade Calculation
Convert raw scores to percentages for academic grading and performance tracking.
Business Metrics
Calculate growth rates, profit margins, and market share changes as percentages.
Pro Tips
- -Use percentage change to compare old and new values like prices or scores.
- -Percentage difference is useful when neither value is clearly the reference point.
- -Double-check which value is the base when calculating percentage of a number.
You might also like
Currency Converter
Convert between 150+ world currencies with daily rates.
MathStatistics Calculator
Calculate mean, median, mode, standard deviation and more.
MathJPG ↔ PNG
Convert images between JPG and PNG instantly, without uploading to any server.
ImageTOTP / 2FA Generator
Generate and verify time-based one-time passwords for two-factor auth.
Cybersecurity