About

Percentage Calculator

Calculate percentages, increases, decreases and ratios

What is X% of Y?

What is% of?

Enter values to calculate percentage

About This Tool

Percentage Calculator is a versatile free online tool designed to handle all common percentage calculations. Whether you need to calculate what percentage one number is of another, find a percentage of a value, determine percentage increase or decrease, or apply percentage changes to values, this calculator has you covered. Percentages play a crucial role in everyday life — from calculating shopping discounts and sale prices during holiday sales, to determining tip amounts at restaurants, to understanding financial interest rates and investment returns. Students use percentage calculators for grading and academic scoring, while business professionals rely on them for analyzing growth metrics, profit margins, and statistical data. It's perfect for anyone who works with percentages regularly and needs quick, accurate results.

How to Use

  1. Select the type of percentage calculation you need from the tabs.
  2. For 'What is X% of Y?': Enter the percentage (X) and the base number (Y), then click Calculate.
  3. For 'X is what % of Y?': Enter the part (X) and the whole (Y), then click Calculate.
  4. For 'Percentage increase/decrease': Enter the original value and the new value, then click Calculate.
  5. For 'X% increase/decrease of Y': Enter the base value and the percentage change, select increase or decrease, then click Calculate.
  6. View your result instantly with clear formatting.

Frequently Asked Questions

Use the 'Percentage increase/decrease' tab. Enter the original price as the first value and the sale price as the second value. The calculator will show you the percentage discount.
Yes! Use the 'X is what % of Y?' tab. Enter your score as X and the total possible points as Y. The result shows what percentage you achieved.
Use the 'X% increase/decrease of Y' tab. Enter the price as Y, the tax rate as X%, select 'Increase', and click Calculate. The result shows the price including tax.
Yes, the calculator uses precise mathematical formulas. However, for important financial decisions, always verify calculations and consult with a financial professional when needed.
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