Percentage Calculator

What is X% of Y?

Enter values to calculate
Formula: (X ÷ 100) × Y

Percentage Change

Enter values to calculate
Formula: ((New - Old) ÷ Old) × 100

X is what % of Y?

Enter values to calculate
Formula: (X ÷ Y) × 100

Specialized Percentage Calculators

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🔍 For Seniors
Large buttons and clear display
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📖 Learn Percentage Math
Easy methods for calculating percentages

All Calculators

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📚 Calculator Guides & Tips

How to Use This Percentage Calculator

Step-by-Step Guide:

  1. Choose your calculation type (what is X% of Y, X is what % of Y, etc.)
  2. Enter the base number in the first field
  3. Enter the percentage or target number in the second field
  4. Click "Calculate" to get your result

Understanding Your Results

Your calculation result provides important insights for making informed decisions. The percentage calculator takes into account base number, percentage value, calculation type to give you an accurate estimate that you can use for planning and budgeting purposes.

Tips for Accurate Calculations

  • Always use the most current and accurate data available
  • Double-check your inputs for any typing errors
  • Consider consulting with a professional for complex financial decisions
  • Use this calculator as a starting point for your research and planning

Why Percentage Calculator Matters

Percentage calculations are essential for understanding discounts, tax calculations, grade scores, business metrics, and financial analysis. Whether you're shopping, studying, or analyzing data, accurate percentage calculations help you make informed decisions.

When to Use This Calculator

  • Calculating discounts and sale prices while shopping
  • Determining tax amounts on purchases or income
  • Converting grade scores to percentages
  • Analyzing business growth rates and metrics
  • Computing tip amounts at restaurants
  • Understanding loan interest and investment returns

Common Mistakes to Avoid

  • Confusing "what percent of" vs "percent increase/decrease"
  • Forgetting to convert percentages to decimals (divide by 100)
  • Not understanding the difference between percentage points and percent
  • Mixing up the base value and the comparison value

Real-World Examples

Example 1: Shopping Discount Calculation

Situation: Lisa sees a $200 dress marked 30% off and wants to know the final price.
Using the calculator: Original price: $200, Discount: 30%
Result interpretation: Discount amount: $60, Final price: $140
Next steps: Don't forget to add sales tax to the discounted price for the total amount you'll pay.

Frequently Asked Questions

What's the difference between percentage and percentage points?

Percentage points measure the absolute change in percentage. For example, if interest rates go from 5% to 7%, that's a 2 percentage point increase, but a 40% relative increase.

How do I calculate percentage increase or decrease?

Use the formula: ((New Value - Old Value) / Old Value) × 100. For example, if a price goes from $100 to $120, the increase is ((120-100)/100) × 100 = 20%.

Can I use this for calculating compound growth?

This calculator is best for simple percentage calculations. For compound growth over multiple periods, consider using our investment or loan calculators.