Discount Calculator

Enter an original price and a discount percentage to instantly see the final sale price and exactly how much money you save. Stack multiple discounts and add sales tax — no sign-up, and nothing you type ever leaves your browser.

What is the Discount Calculator?

The Discount Calculator is a free online tool that turns a marked-down price into two numbers you actually care about: the final sale price and the exact amount of money you save. Type in the original price and the percent off, and it instantly shows what you will pay and how much you are keeping in your pocket. Unlike a basic "percent off" widget, it also lets you stack several discounts on top of each other and add sales tax, so the figure on screen matches what the register will charge.

How to use it

Enter the original price of the item (the full, pre-sale price on the tag).
Enter the discount percentage (for example 25 for 25% off).
Read the result instantly: the calculator shows the final price and, on its own line, how much you save plus the total percent off.
Optional — turn on stacked discounts to add a second or third percentage (such as a coupon on top of a sale).
Optional — switch on the tax field and enter your local sales-tax rate to see the real checkout total.

Everything updates the moment you type, so you get your answer in a second and can close the tab and get on with your shopping.

The formula behind it

A single discount is simple arithmetic:

Amount saved = original price × (discount % ÷ 100)
Final price = original price − amount saved, which is the same as original price × (1 − discount % ÷ 100)

Stacked discounts are where people most often make a mistake. Two discounts do not add together. Each one applies to the price left after the previous one:

Final price = original price × (1 − d1 ÷ 100) × (1 − d2 ÷ 100) × …

Stacked discounts apply one after another, not added together. So a 30% discount followed by an extra 20% off is 1 − (0.70 × 0.80) = 0.44, meaning 44% off, not 50% off.

With tax, the tax rate is applied to the already-discounted price:

Total = discounted price × (1 + tax % ÷ 100)

Examples

Single discount: A jacket is $80 at 25% off. Amount saved = $80 × 0.25 = $20. Final price = $60.
Stacked discount: A $120 pair of shoes is 30% off, with an extra 20% coupon. After 30% off it is $84; the extra 20% brings it to $67.20. Total saved = $52.80 (44% off overall), not 50%.
With tax: A $50 gadget at 10% off is $45. Adding 8% sales tax makes the checkout total $48.60.

Common use cases

Online shopping: Check whether a flash-sale price plus a coupon code is actually the best deal before you click buy.
In-store sales: Work out the real price of a "30% off, plus 20% at the register" sign without trusting the headline number.
Black Friday and seasonal promotions: Compare two offers quickly when stores stack coupons on clearance prices.
Budgeting: See the after-tax total so a "cheap" sale item does not blow your budget at the register.
Small retailers and resellers: Set or sanity-check markdown prices and confirm the margin after a promotion.

Why use this one

Most discount calculators stop at a single percentage and only show the final price. This one is built for how people really shop: apply two or more percent-off discounts in sequence and see the true combined price instead of wrongly adding them up; the dollar amount you save and the total percent off are shown front and center so you can judge a deal at a glance; and an optional tax field gives you the real checkout total. It calculates as you type, needs no sign-up, and runs entirely in your browser, so none of your numbers are ever sent to a server.

Frequently asked questions

How do I calculate a discount?

Multiply the original price by the discount percentage to get the amount you save, then subtract that from the original price. For example, 25% off $80 is $80 x 0.25 = $20 saved, leaving a final price of $60. This calculator does both steps for you instantly.

How do I apply two discounts at once?

Stacked discounts apply one after another, not added together. A 30% discount followed by an extra 20% off is not 50% off — the second discount applies to the already-reduced price. Turn on stacked discounts to enter each percentage and see the true combined price.

Does the calculator include sales tax?

Yes. Enable the optional tax field and enter your tax rate; the tool applies tax to the discounted price so you see the real amount you will pay at checkout.

Is my data sent to a server?

No. Every calculation runs entirely in your browser. No prices, totals, or inputs are uploaded, stored, or shared, and you do not need an account.

What is the difference between percent off and amount off?

Percent off is a proportion of the price (e.g. 20% off), so the dollar savings grow with the price. Amount off is a fixed dollar reduction regardless of price. This tool works with percent off and converts it to the exact dollar amount you save.