Calculate percentages online free with SavyTools’ percentage calculator, which handles a percentage of a number, a percentage change, and discounts in one place. If you need a discount calculator for a sale price, or want to work out a percentage increase between two values — a salary change, exam marks, or a price rise — enter the numbers and get the result instantly, with nothing sent to a server.
Everything runs in your browser, with instant results as you type. Nothing you enter is sent to a server or stored anywhere.
How to Use
- Choose the type of calculation you need: a percentage of a number, a percentage change, or a discount.
- Enter the numbers asked for, such as the percentage and the total.
- Read the result instantly, including any breakdown the tool shows.
- Adjust the numbers to compare different cases, such as two discount levels.
Frequently Asked Questions
How do I work out X percent of Y?
Enter the percentage and the number. For example, 20% of 150 is 30, and the tool gives you that answer instantly.
How do I find a percentage increase or decrease?
Enter the old value and the new value. For example, going from 80 to 100 is a 25% increase, and the tool shows both the percentage and the difference.
Can it work as a discount calculator?
Yes. Enter the original price and the discount percentage to see the final price and how much you save. For example, a 25% discount on 180 leaves a price of 135, saving 45.
Tips
For sale prices, apply the discount first and then any tax, since the order changes the final amount. When comparing two deals, work out the final price for each rather than comparing the percentages alone, because the same percentage means different savings on different prices. Round the result sensibly before quoting it to someone else.
Also try our Mortgage Calculator tool when you need to estimate a monthly home loan payment.