Discount calculator
Enter a price and a discount to see what you pay and what you save.
Processed on your device — nothing is sent anywhere.
How it works
- Enter the original price of the item.
- Enter the discount percentage — the final price and amount saved appear instantly.
- To find an unknown discount instead, switch to the second mode and enter the original and final prices.
Frequently asked questions
- How is a discount calculated?
- The saving equals the original price multiplied by the discount percentage divided by 100. Subtracting that saving from the original price gives the final price. For example, 20% off $80 saves $16, so you pay $64.
- How do I find the discount percentage from two prices?
- Divide the difference between the original and final price by the original price, then multiply by 100. If a jacket dropped from $120 to $90, the difference is $30, and 30 divided by 120 is 0.25 — a 25% discount.
- Do two stacked discounts add up?
- No. A 20% discount followed by an extra 10% is not 30% off, because the second discount applies to the already reduced price. In that example you pay 80% times 90% of the original, which works out to a 28% total discount.
- How do I work out a discount quickly in my head?
- Start from 10 percent, which is just the price with the decimal point moved one place left, then scale it: 30 percent is three times that, and 5 percent is half of it. For 25 percent off $60, take 10 percent ($6), double it ($12), add half of $6 ($3), and you get $15 off — so you pay $45.
- Is sales tax applied before or after a discount?
- In nearly all stores the discount is applied first and tax is charged on the reduced price, so a bigger discount also means slightly less tax. The exact rules vary by country and by how a promotion is structured, but the receipt total is almost always tax on the discounted amount.
About this tool
This discount calculator answers the two questions every sale raises: what will I actually pay, and how much am I really saving? Enter the original price and the discount percentage and both numbers appear instantly. A second mode works backwards — enter the original and final prices and it tells you the discount percentage, which is useful for judging whether a claimed deal is as generous as it sounds.
The arithmetic runs directly in your browser as you type. Nothing is submitted, stored or sent to a server, there are no accounts or ads mid-calculation, and the page keeps working offline once it has loaded — practical when you are comparing prices in a store with a weak signal.
Beyond simple sale prices, the calculator covers everyday situations that are easy to get wrong: checking a receipt after a promised percentage was applied, comparing a percentage discount against a flat amount off, verifying that a pre-sale price hike has not quietly eaten the advertised markdown, or splitting out how much a coupon really saved. The reverse mode is also handy for sellers deciding what percentage a planned price cut represents.
Two things are worth remembering at checkout. Stacked discounts multiply rather than add — an extra 10 percent off an item already reduced by 20 percent gives 28 percent total, not 30 — so calculate them in sequence. And when comparing offers across stores, always compare the final prices rather than the percentages: 40 percent off an inflated price can easily cost more than 15 percent off an honest one.