Discount Calculator
Final price after one or stacked discounts, and reverse: what percent off was that really. 100% free, no signup. Everything runs in your browser.
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Enter the original price and the percent off, and this discount calculator gives you the final price and exactly how much you saved. It also answers the two questions stores quietly hope you never ask: what does a stacked discount really add up to, and what percent off was that price actually.
An extra 10 percent off an already 20 percent off item is not 30 percent off. It is 28, because the second discount applies to the reduced price, and the tool shows that math step by step instead of hiding it. Everything runs in your browser and nothing is uploaded.
How to use
- Enter the original price.
- Enter the discount percentage.
- Read the final price and the amount you save.
- For a stacked deal, add the second discount and see the combined true percentage with the working shown.
- For reverse mode, enter the before and after prices to find what percent off was applied.
- Change any number and everything recalculates as you type.
Why use our discount calculator?
Stacked discounts are where this tool earns its keep. Take 20 percent off $100 and you are at $80. The extra 10 percent comes off the $80, not the original $100, so you pay $72, which is a 28 percent total discount. Retailers love stacking precisely because 20 plus an extra 10 sounds like 30, and almost nobody does the multiplication standing at the rack. The tool prints each step so you can see exactly where the missing 2 percent went.
Reverse mode answers the question from the other direction. The tag says $89.99, was $129.99, and the sign claims 30 percent off. Enter both prices: 30.8 percent, so the sign is honest, and now you know instead of trusting. I use this most in January, when up to 70 percent off banners hang over racks that are mostly 20.
What I refuse to add is a fake urgency layer: no countdown timers, no deal ends soon banners, none of the pressure mechanics this calculator exists to defuse. It is a piece of arithmetic with an opinion, and the opinion is that you should see the real number before you pay.
It also keeps the difference between saving money and spending less in view. A $40 saving on a $200 jacket only matters if you were buying the jacket anyway. Seeing the final price in plain digits next to the saving makes that call easier than any red banner does.
For the surrounding math, the percentage calculator covers increases, decreases and everything in between, and the sales tax calculator adds the tax that US shelf prices leave out, so you know the true register total after the discount.
Who is this tool for?
Black Friday and Cyber Monday are the stress test. Storewide 25 percent off plus an extra 15 with the email code sounds like 40, but stacking them honestly gives 36.25 percent. On a $600 purchase that difference is $22.50, which is the sort of gap between expectation and receipt that this tool exists to close before checkout, not after.
Reverse mode settles cross-store comparisons. Store A sells the headphones at $159 marked down from $199. Store B sells them at $149 with no sale sticker at all. The percent off is theater, the final price is the answer, and putting both stores through the same arithmetic stops the discount framing from working on you.
If you sell online yourself, run it backward before announcing a sale. Decide the final price you can actually afford, then work out what honest percentage that represents, rather than promising 40 percent off and discovering it ate your whole margin. UK and EU sellers can pair it with the VAT calculator, since sale prices there include tax by law.
And it works for everyday haggling: outlet stores, open-box discounts, damaged-item markdowns. When a clerk offers to knock something off, you can know within seconds whether that something is generous or cosmetic.
Frequently asked questions
Because the second discount applies to the already reduced price. On $100: the first cut leaves $80, the second takes $8 more, and you pay $72. That is 28 percent off in total. Percentages of different bases never simply add, which is exactly why retailers phrase deals this way.
Use reverse mode. Enter the original price and the price you paid, and the tool divides the saving by the original. From $129.99 down to $89.99 works out to 30.8 percent off.
No. Applying 20 percent then 10 gives the same final price as 10 then 20, because multiplication does not care about order. What matters is that they multiply rather than add, which the step-by-step working makes visible.
You often cannot from the tag alone. Some retailers inflate the was price so the discount looks dramatic, a practice US consumer protection law addresses under deceptive pricing. The FTC consumer site is worth a read on former-price claims. My practical rule: judge the final price against other stores, never the percentage on the sign.
Yes, in sequence. Tax is charged on the price you actually pay, so apply the discount here first, then run the discounted price through the sales tax calculator to get your register total.
Yes. Percentages have no nationality. Enter the numbers in dollars, pounds or anything else and the math is identical. Only the examples on this page happen to be in dollars.
No. The calculation runs entirely in your browser. I have no idea what you are shopping for, and I have designed things so it stays that way.