Calculators
Percentage Calculator
Calculate percentages instantly with our free percentage calculator. Find what percent X is of Y, calculate percentage increase/decrease, and solve all percentage problems quickly and accurately.
Use Percentage Calculator to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Calculate percentages quickly and accurately with our free percentage calculator. Whether you need to find what percentage one number is of another, calculate percentage increase or decrease, or solve complex percentage problems, our calculator provides instant results with clear explanations.
Our percentage calculator is perfect for students solving math homework, shoppers calculating discounts, business professionals analyzing data, or anyone needing quick percentage calculations. Unlike other calculators that show only the answer, we provide step-by-step explanations so you understand the formula and can verify the results.
The calculator handles all common percentage operations: finding what percent X is of Y, calculating X% of Y, finding percentage change (increase or decrease), and determining the original value before a percentage change. All calculations are performed instantly as you type, with no page reloads or annoying ads.
Built for accuracy and ease of use, this percentage calculator works perfectly on desktop, tablet, and mobile devices. Your data never leaves your browser, ensuring complete privacy. Save this page to use the calculator anytime, even offline.
Usage examples
Calculate What Percentage X is of Y
Find what percentage 25 is of 200
Enter First Number: 25, Enter Second Number: 200. Result: 25 is 12.5% of 200. Formula: (25 ÷ 200) × 100 = 12.5%
Calculate X% of Y
Find what is 15% of 250
Enter Percentage: 15, Enter Number: 250. Result: 15% of 250 = 37.5. Formula: (15 ÷ 100) × 250 = 37.5
Calculate Percentage Increase
Calculate percentage increase from 50 to 75
Enter Original: 50, Enter New: 75. Result: 50% increase. Formula: ((75 - 50) ÷ 50) × 100 = 50%
Calculate Shopping Discount
Item originally $120, now 25% off
Enter Original Price: 120, Enter Discount: 25. Result: Sale Price = $90, You Save = $30. Formula: 120 - (25% of 120) = $90
Calculate Test Score Percentage
Student scored 42 out of 50
Enter Score: 42, Enter Total: 50. Result: 84% score. Formula: (42 ÷ 50) × 100 = 84%
How to use
- Select calculation mode: Basic (X is what % of Y), Percentage Of (What is X% of Y), Increase (Increase X by Y%), Decrease (Decrease X by Y%), Change (% change from X to Y), or Difference (% difference between X and Y)
- Enter your first number (X) in the input field
- Enter your second number (Y) in the second input field
- Click "Run Tool" to calculate instantly and see all results
- View result, formula, step-by-step breakdown, decimal form, fraction form, reverse calculation, examples, and visual comparison
- Copy any result by clicking the copy button next to it
- Use quick examples to understand each mode better
- Use "Clear" to reset and start a new calculation
Benefits
- Instant calculations - results appear as you type with no delays
- Multiple calculation types - handles all percentage operations in one tool
- Step-by-step formulas shown - understand how the result was calculated
- No ads or distractions - clean interface focused on your calculation
- 100% free forever - no sign-up, no premium features, no hidden costs
- Complete privacy - all calculations done in your browser, never sent to a server
- Mobile-optimized - works perfectly on phones, tablets, and desktops
- Bookmark-friendly - save and use offline anytime
- Accurate to decimal precision - reliable for professional and academic use
- Handles negative numbers - calculates percentage decrease accurately
FAQs
How do I calculate what percentage one number is of another?
Divide the first number by the second number, then multiply by 100. For example, to find what percentage 25 is of 200: (25 ÷ 200) × 100 = 12.5%. Our calculator does this instantly when you enter both numbers.
What is the formula for calculating percentage increase?
The percentage increase formula is: ((New Value - Original Value) ÷ Original Value) × 100. For example, if a value increases from 50 to 75: ((75 - 50) ÷ 50) × 100 = 50% increase.
How do I calculate a percentage of a number?
To find X% of Y, divide X by 100 and multiply by Y. For example, to find 15% of 250: (15 ÷ 100) × 250 = 37.5. You can also move the decimal: 0.15 × 250 = 37.5.
Can I calculate percentage decrease with this calculator?
Yes! Enter the original (higher) value and the new (lower) value. The calculator will show the percentage decrease. For example, if a price drops from $100 to $75, that's a 25% decrease.
What is the difference between percentage and percentile?
Percentage represents a portion out of 100 (e.g., 75% means 75 out of 100). Percentile is a statistical measure indicating the value below which a given percentage of observations fall (e.g., 90th percentile means you scored better than 90% of people). They are completely different concepts.
What are percentage points and how are they different from percentages?
Percentage points measure the arithmetic difference between two percentages. For example, if interest rates increase from 5% to 8%, that's a 3 percentage point increase, but a 60% relative increase ((8-5)/5 × 100). Percentage points avoid confusion when comparing percentages.
Is this percentage calculator accurate for financial calculations?
Yes, our calculator uses precise decimal arithmetic and is accurate for financial, academic, and professional use. All calculations follow standard mathematical formulas with full decimal precision.
Do I need to install anything to use this calculator?
No installation needed! This is a web-based calculator that works instantly in any modern browser. Just visit this page and start calculating. You can bookmark it for quick access.
Can I use this calculator offline?
Yes! After loading this page once, you can bookmark it and use it offline. All calculations happen in your browser with no internet connection required.
How is this different from other percentage calculators?
Our calculator shows you the formula used for each calculation, has no ads or pop-ups, works instantly without page reloads, and respects your privacy by never sending data to a server. It's also completely free with no premium features.
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