Percent Off Calculator

Easily calculate the final price after applying a percent off discount for products on sale or from a percent off coupon. From a sale price and an original price calculate the percentage discount and the discount amount.

%
off
Share calculator:

Embed this tool:
get code     
    Quick navigation
  1. How to calculate percent off?
  2. Calculate a discount amount and percentage discount
  3. How much is X% off $Y (example calculation)
  4. Common percent off tasks
  5. Percent-Off vs Discount

How to use the percent off calculator

To calculate what is X% off a given price you have to enter the original price (base price) in the first field. Then enter the discount percentage ("percent off") in the second field. When you click "Calculate discount" the percent off calculator will output the final price (the sale price) and the savings you are making as an absolute value in USD, EUR, etc.

To find the discount amount and what percentage discount you are getting, switch to "Percent off & Discount" from the tabs. Then fill the "Original price" and "Sale price" fields. Press "Calculate discount" to find out how much you are saving and the percentage discount you are getting from the specified discounted price.

In many countries and jurisdictions, it is mandatory to display the original price, the discount percent and the sale price (final price) inclusive of all taxes such as sales tax or VAT. If that is not the case, the result from a percent off calculator might not give you the final price since you would need to add taxes manually. Therefore, you should be mindful of the local or regional jurisdiction when using our tool. A full reference list of U.S. state regulations is available on the NIST website under the title "U.S. Retail Pricing Laws and Regulations by State".

    How to calculate percent off?

Percent off calculations are usually needed when there is an item or service on sale, or when you have a percent off coupon and you want to find out your price savings. It is useful when you need to know how much money you would need to pay after the discount has been applied.

For example, if there is a 20% sale of an item that costs $100, how much is the final price in USD? The calculation is one of percentage decrease and uses this formula:

Final price = Original Price x ((100 - %Off) / 100)

Using the numbers above and replacing their values in the equations gives $100 x ((100 - 20) / 100) = $100 x 80/100 = $80 final price. In this case those 20 percent off means 100 - 80 = 20 bucks will remain in your pocket when you purchase

    Calculate a discount amount and percentage discount

Sometimes you know the original price and the sale price, and want to calculate the percentage discount as well as how much money you actually save if you buy at the discounted price. For example, if the original price is $1,000 and the sale price is $700, what is the dollar amount and the discount percentage?

The discount amount is simple to calculate by subtracting the sale price from the full price. In this case that is $1,000 - $700 = $300. So you save $300 with this discount. The discount percentage is calculated as the discount amount divided by the original price: $300 / $1,000 = 0.3. Then multiply the result by 100. With this discount you would get 0.3 · 100 = 30% off.


    How much is X% off $Y (example calculation)

There is a flat screen TV you want to buy and it is on sale with a discount of 25% off the original price of $2,000 due to a promotion or a coupon that you have. To calculate how much is 25% off $2000 plug the numbers into the above formula. Doing so results in:

$2000 x ((100 - 25) / 100) = $2000 x (75 / 100) = $2000 x 0.75 = $1500 final price.

The savings of such a price reduction are then $2000 - $1500 = $500, so with a discount of 25% you save $500 on a $2,000 TV. Here is a brief table showing how much you would save on that same TV with different levels of discounts.

Comparison of discount levels
Original PricePercent OffFinal PriceYou Save
$2,000 5% $1,900 $100
$2,000 10% $1,800 $200
$2,000 20% $1,600 $400
$2,000 30% $1,400 $600
$2,000 40% $1,200 $800
$2,000 50% $1,000 $1,000
$2,000 60% $800 $1,200
$2,000 70% $600 $1,400
$2,000 80% $400 $1,600
$2,000 90% $200 $1,800

All numbers in the table are computed using this calculator. To calculate other percentages (e.g. to know what is 20% off 200, 20% off 1400, 20% off 599, 30% off 25 etc.) other sums and arrive at the final price simply use the percent off calculator above.

percent off

How to calculate 20% percent off

Consider a second example in which we have to calculate 20% off a 50 price tag in some currency. Using the same equation as above, we get:

$50 x ((100 - 20) / 100) = $50 x (80 / 100) = $50 x 0.80 = $40 which is the amount of money one would have to pay at the cashier.

    Common percent off tasks

Below are some commonly computed percent off discounting scenarios with final prices and savings in US dollars:

  • 30% off 50 USD = 35 USD final price (save $15)
  • 20% off 50 USD = 40 USD final price (save $10)
  • 30% off 25 USD = 17.50 USD final price (save $7.5)
  • 20% off 100 USD = 80 USD to pay (save $20)
  • 20% off 150 USD = 120 USD to pay (save $30)

The above math applies to any currency such as Euro, British Pounds, Canadian Dollars, and so on.


    Percent-Off vs Discount

Usually there is no difference between being given a discount of 30% and having 30% off a price, except that you can have a certain percentage off as a part of a sale or liquidation, and not a single product discount. In both cases the final price you pay is 30% off the initial one. For most practical purposes the two are exactly the same so the calculator can be used for both a discount and a coupon. In all cases, consider carefully whether you need the item before purchasing it. You don't have to buy it just because it is some percentage off a higher price as it might still be overpriced or it might not be the best fit for your needs. It will be a healthy thing for your finances.

Some consumer laws require retailers and other merchants that the item was sold at the original price for some minimum amount of time, for example 2-4 weeks, before a discount can be announced on it. For example, in the UK there was a 28-day price establishment recommendation, but it was recently dropped [1]. In other countries there are no such laws and regulations meaning that an item advertised as being sold at a given percentage off, might not actually be any cheaper than usual. Again, staying vigilant and minding the local regulatory framework will make sure the percent off you calculate represents an actual discount rather than an advertising trick.

    References

1Vickery K., Williams A. (2017) "No more "28 day" rule – pricing and promotions under the spotlight", [online] Available at: http://marketinglaw.osborneclarke.com/

    Cite this calculator & page

If you'd like to cite this online calculator resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Percent Off Calculator", [online] available at: https://www.gigacalculator.com/calculators/percent-off-calculator.php [accessed: May 16, 2026].