What is a Percentage Calculator?

A percentage calculator is a versatile tool that helps you perform various percentage calculations instantly. Whether you need to calculate discounts while shopping, determine percentage increases or decreases, or find out what percentage one number is of another, this calculator has you covered. Features 5 calculation modes: What is X% of Y (calculate specific percentage of a number), X is what % of Y (find what percentage one number represents), Percentage Change (calculate increase or decrease between values), Increase/Decrease by Percentage (find result of applying percentage change), and Discount Calculator (calculate final price after discount). Perfect for shopping and sales, tipping at restaurants, calculating taxes, business and finance calculations, academic grade conversions, and statistical analysis. All calculations happen in your browser for complete privacy.

How to Use the Percentage Calculator

Select the calculation mode that fits your needs (5 modes available)
Enter the required values in the input fields
Click Calculate to see instant results
View color-coded results for increases (green) and decreases (red)

Calculator Modes

1. What is X% of Y?

Calculate a specific percentage of a number. Perfect for finding tips, taxes, or any portion of a value.
Example: What is 25% of 200? = 50

2. X is what % of Y?

Find what percentage one number represents of another. Useful for calculating completion rates, scores, or ratios.
Example: 50 is what % of 200? = 25%

3. Percentage Change

Calculate the percentage increase or decrease between two values. Shows whether the change is positive or negative.
Example: From 100 to 150 = 50% increase

4. Increase/Decrease by Percentage

Find the result of increasing or decreasing a value by a specific percentage. Calculates both scenarios simultaneously.
Example: 100 ± 20% = 120 (increase) or 80 (decrease)

5. Discount Calculator

Calculate the final price after applying a discount and see how much you save. Perfect for shopping!
Example: $100 with 25% discount = $75 (save $25)

Common Use Cases

Shopping & Sales: Calculate discounts and final prices
Tipping: Quickly determine tip amounts at restaurants
Taxes: Calculate sales tax or VAT on purchases
Business & Finance: Calculate profit margins, growth rates, and ROI
Academic: Convert scores to percentages and calculate grades
Statistics: Calculate percentage distributions and changes

Features

5 Calculation Modes: Multiple calculators in one tool
Instant Results: Real-time calculations as you type
Visual Indicators: Color-coded results for increases/decreases
Easy to Use: Simple interface with clear labels
Mobile Friendly: Works perfectly on all devices
100% Free: No sign-up or payment required