Percentage Calculator

This is a simple yet powerful calculator for all your percentage calculations. Whether you need to calculate discounts, determine percentage changes, or find what percent one number is of another, this tool makes percentage math quick and easy.

How to Use

  1. What is X% of Y?
    • Enter the percentage in the first field.
    • Enter the number you want to calculate the percentage of in the second field.
    • Example: To find 15% of 200, enter 15 and 200
  2. X is what percent of Y?
    • Enter the number (X) in the first field
    • Enter the total value (Y) in the second field
    • Example: To find what percent 30 is of 150, enter 30 and 150
  3. Percentage Increase/Decrease
    • Enter the original value in the first field
    • Enter the new value in the second field
    • Example: To find the percentage change from 100 to 125, enter 100 and 125

For all calculations, either click the “Calculate” button or press Enter after entering your numbers.

Percentage Calculator

What is X% of Y?

% of

X is what percent of Y?

is what % of

Percentage Increase/Decrease

to
Get It right

Tips For Accurate Results

  • Double-check your input numbers
  • Make sure you’re using the right calculator section for your specific need
  • Pay attention to the order of numbers in the percentage change calculator
  • Look at both the calculation and result to verify your input was correct
  • For complex calculations, break them down into steps using the appropriate calculator sections

Common Use Cases

  • Shopping: Calculate discounts and sales tax
  • Business: Determine profit margins and growth rates
  • Finance: Calculate interest rates and investment returns
  • Education: Solve percentage problems for homework and tests
  • Statistics: Calculate percentage changes and proportions
  • Budgeting: Figure out percentage-based budgets and savings

Frequently Asked Questions

If you have specific questions about your calculations or need help interpreting results, refer to this FAQ or use the examples provided above each calculator.

Remember: This calculator follows standard mathematical rules for percentage calculations and provides results that you can rely on for business, academic, or personal use.

All calculations are accurate to two decimal places, making this tool suitable for most business and academic purposes.

Yes, the calculator handles both positive and negative numbers for all calculations.

It shows both the percentage change and whether it’s an increase or decrease. For example, changing from 100 to 150 shows a 50% increase.

Yes, decimal numbers are fully supported in all calculations.

The calculator can handle numbers up to 15 digits long, suitable for most practical applications.

The calculator will show an error message as division by zero is not possible.

No, the calculator will show an error message as percentage changes from zero cannot be calculated.

Use the “What is X% of Y?” calculator. For example, to find a 20% discount on $100, enter 20 and 100. Subtract the result from the original price to get the discounted price.

Yes, use the “What is X% of Y?” calculator to determine tax amounts. For example, to calculate 8.5% sales tax on $50, enter 8.5 and 50.

Use “X is what percent of Y?” Enter your profit as X and your cost as Y to find your percentage profit margin.