Percentage Calculator

Calculate 3 Types of Percentage Problems

Free online percentage calculator. Instantly calculate 'What % is X of Y', 'What is X% of Y', and 'X is Y% of what'. Perfect for discount calculations, tax calculations, growth rates, test scores, and everyday percentage calculations. Works entirely in your browser with no data transmission.

How to Use

Calculate percentages in 3 steps:

Step 1: Choose Calculation Type
Select from 3 types of calculations based on your need
Step 2: Enter Values
Input the two numbers required for calculation
Step 3: Calculate
Click 'Calculate' button and the result appears instantly

All calculations are performed in your browser. No data is sent to servers.

Percentage Calculator

1. What % is X of Y? (Find the percentage)

is what % of

Result

2. What is X% of Y? (Find the value)

What is

% of

Result

3. X is Y% of what? (Find the whole)

% % of what?

Result

Use Cases

Percentage calculator is useful in various scenarios:

1. Discount Calculations

Calculate discount amounts and final prices. Example: '$50 item at 20% off' → 20% of $50 is $10, final price $40. Useful for sales, coupons, and bargain shopping.

2. Tax Calculations

Calculate sales tax and VAT. Example: '$100 item with 10% tax' → 10% of $100 is $10, total $110. Essential for invoicing, accounting, and price displays.

3. Test Scores & Grades

Calculate test score percentages and grades. Example: '64 correct out of 80 questions' → 64 is 80% of 80. Useful for school tests, certifications, and grading.

4. Growth Rates & Changes

Calculate sales or profit growth rates. Example: '$1M last month, $1.2M this month' → $1.2M is 120% of $1M, growth rate +20%. Used for business analysis, investments, and performance evaluation.

5. Loans & Interest Calculations

Calculate loan interest and payments. Example: '$10,000 loan at 3% annual interest' → 3% of $10,000 is $300. Useful for mortgages, car loans, and credit card payment planning.

What is Percentage Calculation?

Percentage (%) is a unit representing 'how many per hundred', the most common way to express ratios and proportions.

3 Types of Percentage Calculations

This tool supports 3 calculation types: (1) What % is X of Y? (Find ratio): What % is 80 of 200? → 40%. (2) What is X% of Y? (Find value): What is 40% of 200? → 80. (3) X is Y% of what? (Find whole): 80 is 40% of what? → 200. Mastering these three formulas lets you solve any percentage problem.

Percentage Formulas

Basic formula: Percentage = (Part ÷ Whole) × 100. Example: '80÷200×100=40%'. Reverse formula: Value = Whole × (Percentage ÷ 100). Example: '200×(40÷100)=80'. Find whole: Whole = Part ÷ (Percentage ÷ 100). Example: '80÷(40÷100)=200'.

Everyday Applications

Percentage calculations are used everywhere in daily life. Shopping discounts (30% off), bank interest rates (1.5% annual), taxes (10% VAT), test scores (85% correct), nutrition labels (20% fat), weather forecasts (60% chance of rain), and more. This tool lets you calculate instantly without reaching for a calculator or phone.

Frequently Asked Questions

What's the difference between percent and percentage?

Percent is the unit symbol (%), while percentage refers to the numerical value itself. Example: '50%' uses the percent symbol, while 'the percentage is 50' refers to the value. In everyday conversation, they're often used interchangeably.

How do I convert between decimals and percentages?

Decimal to percentage: multiply by 100. Example: 0.75×100=75%. Percentage to decimal: divide by 100. Example: 75÷100=0.75. This tool automatically handles conversions, saving you calculation time.

Can I calculate percentages over 100%?

Yes, calculations above 100% are supported. Example: 'What % is 150 of 100?' → 150% (50% increase). Used for growth rates, price increases, population growth, and other cases exceeding baseline values. Negative percentages (decrease rates) also work.

What's the difference between percentage points and percent?

Percentage points (pp) show absolute difference, while percent shows relative change. Example: Interest rate rises from 5% to 7% → 2 percentage point increase (7-5=2pp), or 40% increase (2÷5×100=40%). This distinction is important in statistics and economic news.

Can I calculate tax-inclusive prices with this tool?

Yes, use the 'What is X% of Y?' calculator. Example: Base price $100, 10% tax → 'What is 10% of 100' gives $10. Tax-inclusive price is $100+$10=$110. Or calculate directly: 'What is 110% of 100' = $110.

How do I calculate prices after discounts?

Use the 'What is X% of Y?' calculator. Example: $50 item at 30% off → (1) 'What is 30% of 50' gives discount $15. (2) 'What is 70% of 50' gives final price $35. Or calculate: '$50 - (30% of $50)'.

Can I calculate multiple percentages in sequence?

Calculate each step separately. Example: $100 increases 20%, then decreases 10% → (1) 120% of $100 = $120. (2) 90% of $120 = $108. Final result is $108 (8% increase). Use the same method for consecutive discounts.

How does rounding work in percentage calculations?

This tool displays results to 2 decimal places (rounds at the 3rd decimal). Example: 33.333...% of 100 displays as 33.33. For accounting or invoicing, follow your company's rounding rules (round down, round up, or round to nearest).