Discount & Sale Price Calculator
(Percent Off, Stacked Discounts & Original Price)
Enter a price and a discount % to get the sale price and the amount saved. Add a second discount, or switch modes to find the original price.
The price before the discount
Percentage off the original price
Optional — Stack a Second Discount
Applied on top of the already-discounted price, e.g. an extra coupon
Calculated Results
Enter a price and discount percentage to see the sale price and savings.
This discount calculator works out the sale price and the amount saved from a percent-off discount. Enter the original price and the discount. You can add a second discount on top of the first to see the final price and the combined percentage, or switch direction and find the original price from a sale price.
How to Calculate a Sale Price
With the discount as a decimal, 25% off $80 is 80 × 0.75 = $60, a saving of $20. The same $80 item at other discounts:
| Discount | Sale price | You save |
|---|---|---|
| 10% | $72.00 | $8.00 |
| 15% | $68.00 | $12.00 |
| 20% | $64.00 | $16.00 |
| 25% | $60.00 | $20.00 |
| 30% | $56.00 | $24.00 |
| 40% | $48.00 | $32.00 |
| 50% | $40.00 | $40.00 |
| 75% | $20.00 | $60.00 |
To find the percent off when you know both prices, divide the saving by the original price: 20 ÷ 80 × 100 = 25%.
Stacked Discounts
When a coupon is used on a sale price, the second discount is taken from the reduced price. The percentages multiply. They do not add.
$80 at 25% off is $60. An extra 10% off takes $6 from that, leaving $54. The total saving is $26, which is 32.5% of the original price, not 35%.
| First discount | Second discount | Added together | Actual combined discount |
|---|---|---|---|
| 20% | 10% | 30% | 28% |
| 25% | 10% | 35% | 32.5% |
| 30% | 20% | 50% | 44% |
| 40% | 15% | 55% | 49% |
| 50% | 50% | 100% | 75% |
The order makes no difference when both discounts are percentages. It does when one is a fixed amount: taking $10 off after the 25% gives $50, and taking it off before gives $52.50.
Finding the Original Price
An item marked $60 after 25% off was 60 ÷ 0.75 = $80. The common mistake is to add the percentage back to the sale price: 60 × 1.25 is $75. The discount was 25% of the original price, and 25% of $60 is a smaller amount.
What a Discount Costs the Seller
For a seller the discount comes straight out of profit, because the cost of the item stays the same.
| On an item that costs $40 | Price | Profit | Margin |
|---|---|---|---|
| Full price | $80 | $40 | 50% |
| 25% off | $60 | $20 | 33.3% |
| 50% off | $40 | $0 | 0% |
At 25% off, the profit on each sale halves, so the sale has to bring in twice as many units to earn the same total. Work out the margin before choosing a discount with the Gross Profit Margin Calculator.
How to Use the Discount Calculator
- Choose the direction: Pick price to sale price, or sale price back to original price.
- Enter the price: Type the original price, or the sale price if you are working backwards.
- Enter the discount: Type the percentage off.
- Add a second discount: Optional, in the price to sale price direction. Enter an extra percentage, such as a coupon on top of a sale, to see the final price and the combined discount.
Frequently Asked Questions
How do I calculate a sale price from a percent off?
Multiply the original price by 1 minus the discount as a decimal. 25% off $80 is 80 × 0.75 = $60. The saving is the difference, $20.
How do I find the original price from a sale price?
Divide the sale price by 1 minus the discount as a decimal. An item at $60 after 25% off was 60 ÷ 0.75 = $80. Adding 25% to $60 gives $75, which is wrong, because the 25% was taken from the original price.
How do I calculate the discount percentage from two prices?
Subtract the sale price from the original price, divide by the original price and multiply by 100. From $80 down to $60 is 20 ÷ 80 × 100 = 25% off.
Do two discounts add up?
No. The second discount is taken from the price already reduced by the first. 25% off and then 10% off is 0.75 × 0.90 = 0.675 of the original price, a combined discount of 32.5%, not 35%.
Does the order of two discounts matter?
No. 25% then 10% and 10% then 25% both leave 67.5% of the original price. The order only matters when one of the discounts is a fixed amount such as $10 off.
How does a discount affect profit margin?
The whole discount comes out of profit, because the cost of the item does not change. An item that costs $40 and sells for $80 earns $40. At 25% off it sells for $60 and earns $20, so the profit per sale is cut in half.
Formulas and worked examples checked in October 2026.