Fast, accurate calculations for all your percentage needs. Choose from 5 different calculation modes.
Select the calculation mode that matches your needs from the tabs at the top.
Input the numbers you want to calculate. The calculator accepts both whole numbers and decimals.
Press the "Calculate" button to get your instant result.
Click the "Copy Result" button to copy the answer to your clipboard, or write it down manually.
Get precise calculations every time. No rounding errors or manual mistakes.
Instant results. No waiting for calculations—get your answer in milliseconds.
Five different calculation modes cover all your percentage needs in one place.
See exactly how each calculation is performed with detailed step-by-step formulas.
No registration, no ads blocking functionality, no hidden fees. Use it as much as you want.
Works perfectly on smartphones, tablets, and desktop computers.
Perfect for students learning percentages, teachers demonstrating concepts, and professionals needing quick calculations.
To calculate a basic percentage (X% of Y), use the formula: (Percentage / 100) × Value. For example, to find 25% of 200, calculate (25/100) × 200 = 50. Our calculator automates this process instantly. Just enter the percentage and value, then click calculate.
Percentage change measures how much a value has increased or decreased as a percentage of the original value. The formula is: ((New Value - Old Value) / Old Value) × 100. For example, if a price increases from $50 to $75, the percentage change is ((75-50)/50) × 100 = 50%. This is useful for tracking price changes, growth rates, and performance metrics.
Percentage change compares two values chronologically (from old to new), making it perfect for tracking growth or decline over time. Percentage difference, on the other hand, treats both values equally without regard to order, using their average as the base. Use percentage change for before/after comparisons and percentage difference for comparing unrelated values equally.
To find what percentage X is of Y, divide X by Y and multiply by 100: (X / Y) × 100. For example, if you want to know what percentage 30 is of 150, calculate (30/150) × 100 = 20%. This is useful for calculating test scores, sales performance, and market share.
To increase a number by a percentage, multiply by (1 + percentage/100). To decrease, multiply by (1 - percentage/100). For example, increasing 100 by 20% gives 100 × 1.20 = 120. Decreasing 100 by 20% gives 100 × 0.80 = 80. This is commonly used for calculating discounts, tips, and salary adjustments.
Yes! Our percentage calculator is completely free to use. There are no hidden fees, subscriptions, or registration requirements. You can use it unlimited times without any cost. We offer it as part of our commitment to providing free educational tools to everyone.
Yes, our percentage calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers. All features and calculation modes are available on mobile devices. The interface automatically adjusts to your screen size for optimal usability.