🏷️ Percent Off Calculator
By ToolNimba Editorial Team · Reviewed by ToolNimba Review Team, consumer finance and pricing content · Updated 2026-06-20
This calculator gives an estimate only and does not include sales tax, shipping, fees or store-specific terms. It is not financial advice, always confirm the final figure at checkout before you buy.
A percent off calculator turns a discount into real money: tell it the original price and the percent off and it shows the sale price and how much you save. You can also work backwards, enter the price you actually paid and it finds the percent off for you. Use it to compare deals, check a sticker that already shows a marked-down price, or plan a sale of your own.
What is the Percent Off Calculator?
Percent off is the most common way stores express a discount, and the math behind it is short. A percentage is just a fraction of 100, so 25% means 25 out of every 100, or 0.25 as a decimal. To take a percentage off a price you multiply the price by that decimal to get the discount amount, then subtract it. A 25% discount on an 80 dollar item removes 80 times 0.25, which is 20 dollars, leaving a sale price of 60 dollars.
There is a faster one-step version that gives the same answer. If 25% comes off, you keep 75%, so you can multiply the original price by 0.75 directly: 80 times 0.75 is 60. In general the sale price equals the original price times (1 minus percent off divided by 100). This shortcut is handy for mental math and is exactly what the calculator does under the hood, it just shows you both the discount and the final price so nothing is hidden.
The reverse question comes up just as often. You see a tag that reads original 80, now 60, and you want to know the discount. Here you take the amount saved, divide it by the original price, and multiply by 100. The saving is 80 minus 60, which is 20, and 20 divided by 80 is 0.25, so the discount is 25%. Switch the calculator to its second mode and it does this for you from the original and final prices.
A few cautions keep the result honest. Percent off applies to the listed price before tax, so the amount you hand over at the till is usually a little higher once sales tax is added. Stacked or coupon discounts are normally applied one after another rather than added together, so 20% off followed by another 10% off is not 30% off, it is 28% off. And a percent off is only a good deal if the original price was genuine, a steep discount from an inflated list price can still be poor value.
When to use it
- Working out the sale price and your saving before you reach the checkout.
- Reverse-checking a marked-down tag to see what percent off the store really gave.
- Comparing two offers, such as 30% off one item versus a flat amount off another.
- Setting your own discount when running a sale and seeing the final price customers pay.
How to use the Percent Off Calculator
- Pick a mode: find the final price from a percent, or find the percent off from a final price.
- Enter the original price.
- Enter the percent off (or tap a quick preset), or in the second mode enter the final price.
- Read off the amount saved and the sale price, then tap Copy result to save it.
Formula & method
Worked examples
A jacket is listed at $80 and is 25% off. What do you pay?
- Convert the percent to a decimal: 25 / 100 = 0.25
- Discount amount = 80 x 0.25 = 20.00
- Sale price = 80 - 20 = 60.00
- One-step check: 80 x (1 - 0.25) = 80 x 0.75 = 60.00
Result: You save $20.00 and pay $60.00.
You paid $60 for a $80 item and want to know the discount.
- Amount saved = 80 - 60 = 20.00
- Divide by the original price: 20 / 80 = 0.25
- Multiply by 100: 0.25 x 100 = 25
Result: That is 25% off, a saving of $20.00.
Sale price and saving at common discounts on a $100 item
| Percent off | You save | Sale price |
|---|---|---|
| 10% | $10.00 | $90.00 |
| 15% | $15.00 | $85.00 |
| 20% | $20.00 | $80.00 |
| 25% | $25.00 | $75.00 |
| 30% | $30.00 | $70.00 |
| 40% | $40.00 | $60.00 |
| 50% | $50.00 | $50.00 |
| 75% | $75.00 | $25.00 |
Quick decimal multiplier for a one-step sale price
| Percent off | Multiply price by | Example on $50 |
|---|---|---|
| 10% | 0.90 | $45.00 |
| 20% | 0.80 | $40.00 |
| 25% | 0.75 | $37.50 |
| 33% | 0.67 | $33.50 |
| 50% | 0.50 | $25.00 |
| 60% | 0.40 | $20.00 |
Common mistakes to avoid
- Adding stacked discounts together. Two coupons of 20% and 10% are applied one after another, not summed. 20% off then 10% off leaves you paying 0.80 x 0.90 = 72% of the price, which is 28% off, not 30%.
- Forgetting sales tax and fees. The percent off comes off the pre-tax list price. Tax, shipping and any handling fees are added afterward, so the amount you actually pay is usually a little higher than the sale price shown.
- Confusing percent off with percent of. 25% off means you pay 75% of the price. Reading 25% as the amount you pay rather than the amount removed flips the calculation and overstates the saving.
- Trusting the discount without checking the base price. A large percent off an inflated original price can still be poor value. Compare the final price against other sellers, not just the size of the headline discount.
Glossary
- Original price
- The full list price of an item before any discount is taken off. Also called the regular or list price.
- Percent off
- The share of the original price removed as a discount, written as a percentage such as 25%.
- Discount amount
- The money taken off the price, equal to the original price times the percent off divided by 100.
- Sale price
- The amount you pay after the discount, equal to the original price minus the discount amount.
- Stacked discount
- Two or more discounts applied one after another rather than added together, giving a smaller total than their sum.
- Decimal multiplier
- The figure you multiply a price by to get the sale price in one step, equal to 1 minus the percent off divided by 100.
Frequently asked questions
How do I calculate percent off a price?
Multiply the original price by the percent off divided by 100 to get the discount, then subtract that from the price. For 25% off 80, the discount is 80 x 0.25 = 20, so the sale price is 80 - 20 = 60. The calculator shows both figures at once.
How do I find what percent off something is?
Subtract the sale price from the original price to get the saving, divide by the original price, then multiply by 100. If a 80 item now costs 60, the saving is 20, and 20 / 80 x 100 = 25%. Switch the calculator to its second mode to do this automatically.
What is 25% off $80?
A 25% discount removes 80 x 0.25 = 20 dollars, leaving a sale price of 60 dollars. You can also multiply directly by 0.75 to get the same 60 dollars in one step.
Does 20% off then 10% off equal 30% off?
No. Stacked discounts are applied one after the other, so you pay 0.80 x 0.90 = 0.72 of the price, which is 28% off, not 30%. The order of the two discounts does not change the final figure.
Does the calculator include sales tax?
No. It works out the discount on the listed price only. Sales tax, shipping and any fees are added after the discount and vary by location and seller, so add them to the sale price to estimate your true checkout total.
What is the quickest way to take a percent off in my head?
Subtract the percent from 100 and multiply by that decimal. For 30% off, you keep 70%, so multiply the price by 0.70. A 50 dollar item at 30% off is 50 x 0.70 = 35 dollars.
Sources
- Discount , Cornell Law School Legal Information Institute
- How to Calculate a Percentage , Investopedia