Discount Calculator

Know the real sale price

Enter the original price and discount percentage to instantly see the final price and the amount saved. When a store offers an additional discount on the already-reduced price, add it in the extra discount field — the calculator stacks them correctly and shows the combined effective percentage off.

Results

• Final price you pay
• Total amount saved
• Effective combined discount percentage

Key features at a glance

• Finds the final sale price and the amount saved
• Supports a second, stacked discount for 'extra X% off' offers
• Shows the combined effective discount percentage
• Instant results as you type
• Works for any currency and any discount rate
• Runs entirely in your browser, even offline

How discounts are calculated

A percentage discount reduces a price by a fraction of its value. To find the sale price, you multiply the original price by one minus the discount as a decimal: a 25% discount means paying 75% of the price, so a 80 item becomes 80 × 0.75 = 60, saving 20. The amount saved is simply the original price minus the sale price, or equivalently the price times the discount fraction.

Reversing this is a common source of error. If you know the sale price and want the original, you divide rather than multiply: a price after 25% off divided by 0.75 recovers the original. Mixing these up — subtracting the percentage from the discounted price instead of dividing — leads to a number that is too low, which is why a calculator that handles the arithmetic correctly is worth keeping handy.

Why stacked discounts are not what they seem

Stores love to advertise offers like '50% off, then an extra 20% off', and shoppers often assume that adds up to 70% off. It does not. The second discount applies to the already-reduced price, not the original, so the true saving is smaller. Taking 50% off 100 gives 50, and 20% off that 50 gives 40 — a total of 60% off, not 70%.

This calculator stacks the two discounts correctly and shows the real effective percentage off, so you can see at a glance what you are actually paying. Understanding this protects you from overestimating a deal: sequential discounts always combine to less than their simple sum, and the order in which they are applied does not change the final price.

Markdowns, margins, and retail pricing

Retailers think about discounts as markdowns from a list price, and the same arithmetic this tool uses underlies clearance pricing, seasonal sales, and promotional coupons. A markdown reduces the price to clear inventory, and knowing the effective discount helps a business protect its margin while still tempting buyers.

From the shopper's side, the effective discount is the figure to compare across competing offers, because a single large discount and a pair of stacked smaller ones can look similar but differ in real savings. Whether you are setting prices or hunting for the best deal, working from the true effective percentage rather than the advertised headline keeps the comparison honest.

Tips for getting the best deal

• Judge offers by the effective discount, not the sum of the percentages
• Remember stacked discounts always total less than they appear
• To find an original price from a sale price, divide by (1 − discount)
• Compare the final price you actually pay, not the percentage off
• Watch for discounts applied before versus after tax

Why choose our discount calculator?

Our calculator is completely free with no signup, no limits, and no subscription. It runs entirely in your browser, so results are instant, it works offline while you shop, and nothing you enter is sent anywhere.

It is one of more than 200 free tools on ToopTools, and you can pin it to your My Workspace, a personalized workspace where you keep the tools you use most in a single dashboard. Beside the percentage and sales tax calculators, it makes every shopping calculation quick and accurate.

Common use cases

Shoppers use the discount calculator to find the real sale price during promotions, to see how much they are saving, and to decode confusing stacked offers before deciding whether a deal is worthwhile. It is especially useful on busy sale days when the headline percentages are designed to look more generous than they are.

Retailers and resellers use it to set markdown prices and check effective discounts when running promotions, and budget-conscious buyers use it to compare competing offers fairly. Because it works offline, it is handy right in the store aisle when you are weighing up a purchase.

Is the discount calculator free?

Yes. It is completely free with no account, no sign-up, and no usage limits. Calculate as many discounts as you like at no cost.

How do I calculate a percentage discount?

Multiply the original price by one minus the discount as a decimal. For a 25% discount, multiply by 0.75. The amount saved is the original price minus that result, or the price times the discount fraction.

Do two stacked discounts add up?

No. The second discount applies to the already-reduced price, so 50% then 20% off is 60% off in total, not 70%. The calculator shows the true combined effective discount.

How do I find the original price from a sale price?

Divide the sale price by one minus the discount. A price after 25% off divided by 0.75 gives the original. Dividing rather than adding the percentage back is the key step people often miss.

Does the order of stacked discounts matter?

No. Applying 50% then 20% gives the same final price as 20% then 50%, because multiplication is commutative. The effective combined discount is identical either way.

Are my entries kept private?

Yes. Everything is computed in your browser and nothing is uploaded, so your prices stay private and the tool works without an internet connection.

How do I calculate the final price after a discount?

Enter the original price and the discount percentage, and the calculator instantly shows the amount you save and the final price you pay. You can also stack a second discount to see the combined effect on a sale item.

Does the discount calculator work offline?

Yes. The calculation runs entirely in your browser, so once the page has loaded the tool works without an internet connection, and your entries are never uploaded — you can check sale prices privately while you shop.