Percentage Calculator

Calculate percentages instantly with precision and ease. Perfect for discounts, tips, taxes, grades, and financial calculations. Get accurate results in real-time.

Discount20% off $100 = $80
Tip Amount15% of $50 = $7.50
Growth$100 → $125 = +25%

The Bottom Line

This percentage calculator instantly computes two fundamental percentage operations with real-time precision. Calculate "what is X% of Y" to find percentage amounts (like 20% of $100 = $20), or calculate "what percent is Y of X" to find percentage ratios (like 25 is what percent of 100 = 25%). Perfect for shopping discounts, financial calculations, tip amounts, tax computations, grade percentages, business metrics, growth rates, and statistical analysis. Enter values into intuitive input fields and see live results with explanatory text showing your calculation. Each calculator provides visual feedback with highlighted results and clear mathematical expressions. Common use cases include calculating sale prices with discounts, determining restaurant tips, computing sales tax, converting test scores to percentages, measuring business growth rates, and analyzing data proportions. All calculations happen instantly in your browser without page reloads or server requests.

What is X% of Y?

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What percent is Y of X?

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Result
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Common Uses

Discounts

Calculate sale prices and savings on purchases

Growth Rates

Measure percentage increase or decrease

Tips & Taxes

Calculate tips and sales tax amounts

Grades

Convert test scores to percentages

Problems This Percentage Calculator Solves

  • Eliminates mental math errors in percentage calculations - Stop second-guessing whether 15% of $84.50 is correct or miscalculating tips at restaurants. Get instant, accurate results without paper, calculators, or error-prone mental arithmetic.
  • Removes confusion between percentage types - Forget wondering "do I multiply or divide?" when calculating percentages. Two dedicated calculators show exactly which formula applies—finding percentage amounts versus finding percentage ratios.
  • Saves time during shopping and sales - Avoid standing in store aisles trying to figure out final prices after discounts. Calculate 30% off $79.99 instantly to compare deals and make informed purchase decisions on the spot.
  • Prevents tip calculation awkwardness - Stop fumbling with phone calculators at restaurant tables or undertipping/overtipping servers. Calculate exact 15%, 18%, or 20% tips instantly for any bill amount with precision.
  • Eliminates grade calculation guesswork - Forget manually converting test scores like "42 out of 50" into percentages. Instantly calculate what percent you scored to understand academic performance without spreadsheets.
  • Removes tax computation uncertainty - Avoid estimating sales tax amounts when budgeting purchases. Calculate exact tax on any purchase price instantly to know true costs before checkout or when planning expenses.
  • Streamlines business metric analysis - Stop wasting time with spreadsheet formulas for simple percentage calculations. Analyze conversion rates, growth percentages, margin changes, and KPIs instantly without Excel.
  • Prevents investment return confusion - Forget manually calculating if $10,500 from a $10,000 investment represents the growth rate you expected. Instantly compute percentage returns to evaluate investment performance accurately.
  • Eliminates budget percentage allocation errors - Avoid miscalculating how much of your $3,000 budget to allocate when rules specify percentages. Calculate exact amounts for 30% savings, 50% expenses, 20% discretionary instantly.
  • Ensures complete privacy for financial calculations - Stop using percentage calculators that might track shopping habits or financial data. All calculations happen locally in your browser—no numbers ever leave your device.