Percentage Calculator

Calculate percentages, percent change, and what percent one number is of another.

Percentage (%)

Number (Y)

Enter values above to see the result

Quick Reference

10% of 200 = 20

25% of 80 = 20

15 is ?% of 60 = 25%

50→75 change = 50%

100→80 change = -20%

18% of 350 = 63

About Percentage Calculator

Our percentage calculator handles the three most common percentage problems in one clean interface. Use X% of Y to calculate tips, taxes, discounts, or commissions. Use X is what % of Y to find ratios and proportions. Use % Change to measure growth, decline, or price change between two values.

Percentage calculations are fundamental in finance, statistics, science, and everyday life. Whether you are calculating a restaurant tip, finding a discount price during a sale, or analyzing business KPIs, this tool provides instant, accurate results.

All calculations are performed instantly in your browser. No data is sent to any server, ensuring your privacy and enabling offline use.