Discount Calculator — Sale Price & Savings
A 25% discount followed by an extra 10% off sounds like 35% off, but it is not — stacked discounts multiply, and the real saving is 32.5%. This free discount calculator gets it right: enter the original price, the first discount and any second discount, and it shows the sale price, the price after the first discount, exactly how much you save in dollars and as a percentage, and the checkout total with optional sales tax. It is the quick way to check whether a sale is really a bargain, to compare two competing offers, or to price your own products for a promotion without undercharging. All calculations run in your browser, and nothing you enter is sent anywhere.
Your Discount Results
Sale price
$0.00
Common Discounts on a $100 Item
Use this table as a quick reference. Remember that stacked discounts do not add up: 25% off followed by 10% off is a 32.5% total saving, not 35%.
| Discount | You pay | You save |
|---|---|---|
| 10% off | $90.00 | $10.00 |
| 20% off | $80.00 | $20.00 |
| 25% off | $75.00 | $25.00 |
| 30% off | $70.00 | $30.00 |
| 40% off | $60.00 | $40.00 |
| 50% off | $50.00 | $50.00 |
How to Use This Calculator
- Enter the original price. Type the full price before any discount — for example $200.
- Enter the discount percentage. A 25% discount means you pay 75% of the price. Enter 0 if there is no first discount.
- Add a second discount if the store stacks one. A second discount applies to the already-discounted price, not the original price. Enter 0 if there is only one discount.
- Add sales tax if you want the checkout total. Tax is calculated on the final sale price. Click Calculate to see the sale price, how much you save and the total to pay.
Worked Example
Suppose a jacket costs $200 and the store offers 25% off, plus an extra 10% off at the till. The first discount brings the price to $200 × (1 − 0.25) = $200 × 0.75 = $150.00. The second discount applies to that $150, not to the original $200, so the final sale price is $150 × (1 − 0.10) = $150 × 0.90 = $135.00. You save $200.00 − $135.00 = $65.00 in total, which is $65 ÷ $200 = 32.5% off — not 35%, because the two discounts multiply instead of adding.
Frequently Asked Questions
How do I calculate a discount price?
Multiply the original price by 1 minus the discount as a decimal. For 25% off a $200 item: $200 × (1 − 0.25) = $200 × 0.75 = $150.00. The amount saved is $200 − $150 = $50.00.
Do stacked discounts add up?
No — stacked discounts multiply. A 25% discount followed by an extra 10% off is not 35% off: $200 becomes $150 after the first discount, then $150 × 0.90 = $135.00, a total saving of $65.00 or 32.5%. Adding the percentages would wrongly give $130.00.
What is the difference between discount and sale price?
The discount is the amount taken off, and the sale price is what you actually pay. On a $200 item at 25% off, the discount is $50.00 and the sale price is $150.00. The two always add up to the original price.
How do I work out the original price from a sale price?
Divide the sale price by 1 minus the discount as a decimal. If you paid $135 after a 25% discount, the original price was $135 ÷ 0.75 = $180.00. If there were two stacked discounts, divide by each factor in turn.
Is sales tax charged before or after the discount?
In most US states, sales tax is charged on the discounted sale price, not the original price. So a $200 item at 25% off is taxed on $150. Enter your local tax rate in the calculator to see the exact checkout total.