📊 Percentage Calculator
Calculate percentages, increases & decreases instantly
✅ 100% Free • ✅ No Registration • ✅ Instant Results
Why Use Our Calculator?
Instant Results
Get results instantly. No waiting, no complex steps.
Multiple Modes
Calculate percentage, increase, decrease & difference.
Easy to Use
Simple interface. Enter numbers, get results.
Mobile Friendly
Works everywhere. Desktop, tablet, mobile.
100% Private
Data never leaves your device. Always private.
Always Accurate
Precise calculations. No rounding errors.
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Result
- Calculate discounts
- Salary increases
- Grade percentages
- Tip calculations
- Tax calculations
- Growth rates
Understanding Percentages
A percentage is a number expressed as a fraction of 100. Percentages are used everywhere—from discounts and taxes to test scores and financial growth. Use our BMI calculator to track health metrics as percentages of body composition.
Basic Percentage Formula
To find what percentage one number is of another:
Percentage = (Part / Whole) × 100
Example: What percentage is 25 of 200? Answer: (25 / 200) × 100 = 12.5%
Percentage Increase
Percentage Increase = (New Value – Original Value) / Original Value × 100
Example: A price increases from $100 to $120. Percentage increase: (120 – 100) / 100 × 100 = 20%
Percentage Decrease
Percentage Decrease = (Original Value – New Value) / Original Value × 100
Example: A price drops from $100 to $75. Percentage decrease: (100 – 75) / 100 × 100 = 25%
Real-Life Percentage Calculations
Discount Calculations
When shopping, calculate final price with: New Price = Original Price × (1 – Discount%). A $100 item with 30% off: $100 × 0.70 = $70. Track your savings with our financial calculator.
Tip Calculations
At restaurants, calculate tips as: Bill × Tip Percentage. For a $50 bill with 20% tip: $50 × 0.20 = $10 tip.
Test Score Percentages
If you score 45 correct out of 50: (45/50) × 100 = 90%.
Sales Growth
If sales grew from $10,000 to $12,000: ((12,000 – 10,000) / 10,000) × 100 = 20% growth.
Tax Calculations
If tax is 8% and you buy items for $100: $100 × 0.08 = $8 tax. Compare tax amounts with our tax calculator.
Why Percentages Matter
- Shopping: Understand actual savings from discounts
- Finance: Calculate interest, returns, loan costs
- Health: Understand body composition percentages
- Education: Calculate grades and test scores
- Business: Analyze growth rates and margins
- Statistics: Interpret data and probability
Calculator Benefits
Using an online calculator eliminates manual calculation errors. Whether you’re calculating discounts while shopping, figuring salary increases, or analyzing test scores, our calculator provides instant, accurate results. It’s accessible from any device with internet, works offline, and requires no registration.
Track your percentage calculations and notes with our word counter tool for documentation. Visualize your percentage data with our color code converter for better analysis.
Privacy & Security
All calculations happen in your browser using JavaScript. Your data never leaves your device, is never stored on servers, and is never logged or tracked. You have complete privacy and control.