Type the original price and the percent off - the sale price and the amount you save update as you type. Add an extra coupon to see a stacked deal's true total (the coupon applies to the already-reduced price, so 25% then 10% is 32.5% off, not 35%), and an optional sales-tax percent shows the final price at the register. A reference table below the result prices the common 10% to 70% discounts against your amount.
Discount Calculator
The discount calculator answers the checkout question directly: enter the sticker price and the percent off, and the sale price plus the amount you save are on screen as you type. Everything runs in your browser - nothing you enter is stored or sent anywhere, and no account is needed.
Key features
- An optional sales-tax percent is applied after the discounts, adding the tax amount and the final register price to the breakdown.
- A breakdown table walks every step - original price, after the first discount, after the coupon, tax, and final price.
- A reference table below the result prices the common discounts - 10, 15, 20, 25, 30, 40, 50 and 70 percent off - against your amount, each with its sale price and savings.
- Out-of-range entries are corrected, not errored - the percents clamp to 0-100 and the price floors at 0.
How stacked discounts add up
An extra coupon applies to the already-reduced price, not the original, so two deals multiply rather than add. The result states the true combined percentage whenever a coupon is entered.
| Deal | Quick guess | Actual total off |
|---|---|---|
| 25% off, then an extra 10% coupon | 35% off | 32.5% off |
Reading the totals
The math is plain arithmetic on the numbers you type. Stores sometimes round line items differently, so the register total can differ by a cent - the result says so itself.
For other money math on this site, the percentage calculator answers generic percent questions (X% of Y, percent change), the sales tax calculator starts from the tax side of a purchase, and the tip calculator splits a bill - this page is for percent-off deals only: price in, sale price and savings out.
Frequently Asked Questions
What does the discount calculator do?
It turns an original price and a percent off into the sale price and the amount you save, live as you type. An optional extra coupon and an optional sales-tax percent extend the result to the final price at the register.
How are stacked discounts calculated?
Multiplicatively: the extra coupon applies to the already-reduced price, not the original. 25% off followed by an extra 10% coupon is 32.5% off in total - not 35% - and the result states the true combined percentage whenever a coupon is entered.
Does it include sales tax?
Optionally. Enter a flat tax percent and it is applied after the discounts, with the tax amount and the final register price added to the breakdown table. It is a plain percent you supply - not a lookup of your region's tax rate.
Does anything I enter leave my browser?
No. The math runs locally in the page - nothing is uploaded, stored or sent, and no account is needed.
Does this work out Black Friday and Cyber Monday stacked deals?
Yes - that is exactly what the stacked-coupon field is for. A common Black Friday pairing, 30% off the shelf price plus an extra 20% off at checkout, totals 44% off the original price, not 50%, because the second discount is taken off the already-reduced price. Enter your own two percentages above for the real sale price and savings on any Black Friday or Cyber Monday deal.
Why does the store's register show a slightly different total?
Stores may round each line item differently (and some apply tax per item rather than on the subtotal), so the register total can differ from this result by a cent. The calculator is plain arithmetic on the numbers you enter - it is not pricing or tax advice.