Percentage Calculator

What is a Percentage Calculator?

A percentage calculator is a versatile mathematical tool that helps you perform various percentage-related calculations instantly. Whether you need to calculate discounts, tax amounts, percentage increases or decreases, or determine what percentage one number is of another, this tool provides accurate results in real-time. Our calculator supports four distinct calculation modes to cover all common percentage use cases, making it perfect for students, professionals, shoppers, and anyone who needs quick percentage calculations.

How to Use the Percentage Calculator

Select your calculation mode from the available options
For "What is X% of Y?" - Enter the percentage and the number
For "X is what % of Y?" - Enter both numbers to find the percentage
For "Percentage Change" - Enter original and new values
For "Add/Subtract %" - Enter the number, percentage, and choose operation
View instant results as you type
Results update automatically with each change
Use the calculated values for your specific needs

Key Features

4 Calculation Modes

What is X% of Y, X is what % of Y, Percentage Change, and Add/Subtract percentage - covering all common percentage calculations.

Real-time Results

Instant calculations as you type with automatic updates - no need to click calculate buttons.

Easy Mode Switching

Quickly change between calculation types with clear mode selection and intuitive interface.

Decimal Precision

Accurate results with proper decimal handling for precise percentage calculations.

Clean Interface

Intuitive design for effortless calculations - simple inputs with clear labels and results.

No Registration

Free to use without sign-up, downloads, or installations - works instantly in your browser.

Common Use Cases

Shopping

Calculate discounts and sale prices to find actual savings and compare deals.

Finance

Determine tax amounts, interest rates, and financial percentages for budgeting.

Business

Analyze profit margins, revenue growth rates, and business metrics.

Education

Solve math homework problems and understand percentage concepts.

Analytics

Calculate percentage changes in data, metrics, and performance indicators.

Cooking

Adjust recipe quantities by percentage for scaling up or down.

Why Choose Our Percentage Calculator?

✓Multiple modes covering all common percentage calculations
✓Real-time results that update as you type
✓Clean, distraction-free interface
✓Works on all devices - desktop, tablet, and mobile
✓No installation or downloads required
✓Completely free with no hidden costs
✓Privacy-focused - all calculations happen in your browser
✓Fast and accurate mathematical computations
✓Easy to understand results with clear labels
✓Perfect for quick calculations on the go

Frequently Asked Questions

How do I calculate what is 20% of 150?

Select "What is X% of Y?" mode, enter 20 as the percentage and 150 as the number. The result will show 30.

How do I find what percentage 30 is of 150?

Select "X is what % of Y?" mode, enter 30 as the first number and 150 as the second. The result will show 20%.

How do I calculate percentage increase?

Select "Percentage Change" mode, enter the original value and the new value. A positive result indicates an increase, negative indicates a decrease.

Can I add a percentage to a number?

Yes! Select "Add/Subtract %" mode, enter your number and percentage, and choose "Add" operation. For example, adding 20% to 100 gives 120.

Is the percentage calculator accurate?

Yes, our calculator uses precise mathematical formulas and handles decimal places correctly for accurate results.

Do I need to install anything?

No, the calculator works entirely in your web browser. No downloads or installations required.

Can I use this for business calculations?

Absolutely! It's perfect for calculating profit margins, discounts, tax amounts, and growth rates.

Does it work on mobile devices?

Yes, the calculator is fully responsive and works perfectly on smartphones and tablets.

What is X% of Y?

Quick Reference

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