Calculate final price, savings amount, and original cost after discounts.
How to Use Discount Calculator
Choose your currency.
Enter the original price and the discount percentage.
Add an extra discount if there's a coupon on top, and the sales tax rate if it's added at checkout.
Read the final sale price, your total savings and the tax amount.
Stacked discounts don't simply add up
A 20% discount followed by an extra 10% is not 30% off. The second discount is taken from the already-reduced price: 100 becomes 80, then 10% of 80 comes off, leaving 72. That's 28% off in total. This calculator applies discounts in that order, which is how most shops and coupon codes work.
Tax comes last
Sales tax is added after the discounts, on the price you actually pay, which is how it's charged at checkout in places like the US. The savings figure compares the original price with the discounted price before tax. If prices where you shop already include tax, as with VAT in the UK, Europe and India, leave the tax box at 0.
Key Features & Practical Use Cases
Checking the real price of an item that's 30% off.
Working out what a coupon on top of a sale price actually saves.
Comparing deals in shops or online before buying.
Adding sales tax to a discounted price to know what you'll pay at the till.
Frequently Asked Questions
How do I calculate a discount?
Multiply the price by the discount percentage and divide by 100, then subtract that from the price. 25% off 80 is 80 - 20 = 60.
Is 20% off plus 10% off the same as 30% off?
No. Stacked, it's 28% off, because the second discount applies to the reduced price.
Should I enter tax?
Only if tax is added at checkout, as in most US states. Leave it at 0 if the price already includes VAT or GST.
Does the currency change the maths?
No. It only changes the symbol shown.
About OneClickly
OneClickly is a set of 119 free tools for PDFs, images, text, everyday math and code. They run in your browser, so the files and text you work with stay on your device.
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