Percentage Calculator
Calculate percentages: increases, discounts, differences.
Quick percentages:
Online percentage calculator: taxes, discounts, tips, and more
Percentages are present in our daily lives more than we might imagine. From calculating sales tax on a purchase, to determining how much you save with a 30% discount at a store, or how much to leave as a tip at a restaurant. Our percentage calculator lets you solve these calculations instantly with four different modes: calculate a percentage of a number, apply increases, apply discounts, and determine the percentage change between two values.
In finance, percentages are essential for understanding credit and savings interest rates, investment returns, inflation, and profit margins. For example, if a bank offers a 12% effective annual interest rate, this tool helps you calculate exactly how much you will earn on your capital.
The calculator works in real time: as you enter values, the result updates automatically. You don't need to press any button to get your answer. It's perfect for students, merchants, accountants, and anyone who needs to make quick and accurate percentage calculations.
Frequently asked questions
How do I calculate sales tax?
To calculate sales tax on a product, select the "X% of Y" mode, enter the tax rate as the percentage and the product price as the number. For example, for a product priced at $100 with a 10% tax, the tax would be $10 and the total price with tax would be $110. You can also use the "Increase" mode with the tax percentage to get the final price directly.
How do I calculate a discount percentage?
Use the "Discount" mode: enter the discount percentage and the original price. The calculator will show you the final price with the discount applied. If you want to know what percentage a discount represents, use the "Difference" mode with the original price and the discounted price to get the exact percentage reduction.
What is percentage change?
Percentage change measures the relative variation between an initial value and a final value. It is calculated with the formula: ((final value - initial value) / |initial value|) x 100. A positive result indicates an increase and a negative result indicates a decrease. It is useful for comparing prices, salaries, sales, or any metric over time.
Want to learn more? Read our complete guide →