Find the sale price, savings, or original price behind any discount.
Find the sale price, the exact amount you save, or work backward to the original price.
Our discount calculator works out the sale price and exact savings from an original price and a discount percentage — or works backward to find the original price if you already know the sale price and the discount applied. This online tool handles both directions instantly, so you never have to do the math in your head while standing in a checkout line or comparing deals online.
A discount calculator is an online tool that computes the final price of an item after a percentage discount is applied, along with the exact amount saved. Some discount calculators, including this one, also work in reverse — taking a sale price and a discount percentage to figure out what the original, pre-discount price must have been.
While calculating a simple round-number discount like "20% off $100" is easy enough in your head, real-world sale prices rarely land on such clean numbers, and working out something like "35% off $67.49" reliably without a calculator is much harder than it looks.
An online sale price calculator removes that friction entirely, applying the exact percentage math instantly regardless of how awkward the starting numbers are.
The reverse calculation — finding the original price from a sale price and discount percentage — is particularly useful for comparing deals, verifying that an advertised "original price" for a sale item is accurate, or simply satisfying curiosity about what something cost before a markdown.
Our free discount calculator provides a fast, reliable way to handle both types of calculations without doing manual math. Simply switch between "Find Sale Price" and "Find Original Price," enter your numbers, and get an instant result.
Calculate the final price after any discount percentage is applied.
Work backward from a sale price and discount to the starting price.
View the precise dollar amount saved alongside the final price.
Switch between currencies so results display the way you need.
All calculations happen locally in your browser, never on a server.
Select "Find Sale Price" or "Find Original Price" depending on your need.
Type in the original price or the sale price, based on your chosen mode.
Type in the discount percentage being applied.
Click Calculate to instantly see your result.
Get an accurate sale price and savings figure in a fraction of a second.
Your numbers never leave your browser or get uploaded anywhere.
Compare as many prices and discounts as you need, with no limits.
Quickly check the real price of an item before buying during a sale.
Set sale prices or verify markdowns when running a promotion.
Compare which of several discounted offers actually gives the better price.
A single discount is straightforward: one percentage is applied once to the original price. Stacked, or successive, discounts — like "20% off, plus an extra 10% off" — work differently than most people assume, and this is one of the most common sources of shopping math confusion.
The instinct is often to add the two percentages together, assuming "20% off plus 10% off" equals "30% off." In reality, successive discounts are applied one after another, with the second discount calculated on the already-reduced price, not the original price.
For example, on a $100 item, 20% off brings the price to $80. A further 10% off is then applied to that $80, not the original $100, resulting in $72 — a total discount of 28%, not the 30% a simple addition would suggest.
This matters because stacked discounts almost always work out to slightly less savings than adding the percentages together would imply, which is useful to know when comparing a single large discount against a combination of smaller ones.
This calculator handles single discounts directly; for stacked discounts, apply the first discount, then use the resulting sale price as the "original price" input for the second discount to see the true final price.
Discounts and sales are everywhere — retail stores, online shopping, subscription services — and having a fast, reliable way to check the real numbers behind a percentage-off offer helps you shop with more confidence.
One of the biggest benefits of a discount calculator online is accuracy. There's no risk of a mental math slip when working out what 35% off actually comes to on an odd-numbered price.
The reverse mode — finding the original price from a sale price and discount — is also useful for verifying that a "was" price advertised during a sale actually matches the stated discount percentage, helping you spot inflated reference prices.
Seeing the exact dollar amount saved, not just the percentage, also makes it easier to judge whether a discount is genuinely worth acting on, especially when comparing offers with different starting prices.
Because the calculation happens instantly in your browser, it's also a convenient tool to pull up on a phone while actually shopping, without needing an app or an internet-dependent service.
A wide range of people reach for a discount calculator whenever a percentage-off offer is involved, whether shopping, running a business, or simply comparing numbers.
Shoppers calculate sale prices and total savings before making a purchase decision, both in-store and online.
Business owners calculate sale prices when running promotions, and verify that discounted pricing is set correctly across their inventory.
Deal-focused shoppers compare multiple discount offers to identify which one actually provides the best final price.
Students and budget-conscious individuals use discount calculations as part of everyday financial planning and spending decisions.
Many people simply want to double-check that an advertised sale price matches the stated discount percentage before trusting it.
Behind the simple "X% off" label, a discount calculation involves a few straightforward steps that are worth understanding, especially for the reverse calculation.
To find the sale price, the discount percentage is first converted to a decimal and multiplied by the original price to get the discount amount. That discount amount is then subtracted from the original price to arrive at the final sale price.
The amount saved is simply the discount amount itself — the difference between the original price and the sale price, expressed in currency rather than as a percentage.
Working backward is slightly less intuitive. Since the sale price represents (100% − discount%) of the original price, the original price is found by dividing the sale price by (1 − discount as a decimal). For example, if an item sold for $80 after a 20% discount, the original price is $80 ÷ 0.80 = $100.
A common mistake is to simply add the discount percentage back to the sale price — for instance, assuming a $80 sale price with a 20% discount means the original price was $80 + 20% of $80 = $96. This is incorrect, because the 20% discount was originally calculated on the higher, unknown original price, not on the lower sale price. The correct method (dividing by 1 minus the discount rate) accounts for this properly.