Discount Calculator
Find the final price after a percentage discount, see how much you save, or work out the discount from an original and a sale price.
Sale price after a discount
Enter the original price and the percentage off. If the store is stacking a second offer, add it as an extra discount.
Find the discount percentage
Know the original price and the sale price? Find out how much was taken off.
How a discount works
A percentage discount removes that share of the original price. What is left is the final price. The calculator shows both the amount you save and the price you pay.
Discount formulas
Savings = Original price × (Discount ÷ 100)
Final price = Original price − Savings
Discount % = (Original price − Sale price) ÷ Original price × 100
Worked examples
| Situation | Working | Result |
|---|---|---|
| 80 at 25% off | 80 × 0.25 = 20 | Save 20.00, pay 60.00 |
| 250 at 15% off | 250 × 0.15 = 37.5 | Save 37.50, pay 212.50 |
| Price drops from 120 to 90 | (120 − 90) ÷ 120 × 100 | 25% off |
Two discounts are not one bigger discount
When a store takes 20% off and then an extra 10% off, the second discount applies to the already-reduced price. On a price of 100, the first discount leaves 80 and the second takes 10% of that, leaving 72. You save 28, not 30. The order does not change the result: 10% first and then 20% also ends at 72.
Compare final prices, not just percentages
A bigger percentage is not always the better deal. 30% off an item that costs 100 leaves 70, while 20% off a similar item that costs 80 leaves 64.
What about sales tax or VAT?
This calculator does not add tax. In many places tax is charged on the discounted price, but the rules differ by country, state and store, so check the seller's terms or your receipt. To estimate it yourself, multiply the final price by 1 plus the tax rate as a decimal, for example 1.05 for 5% tax.
Frequently asked questions
How do I calculate 20% off?
Multiply the price by 0.80, which is 1 minus 0.20. For example, 20% off 50 is 50 × 0.80 = 40.
Does 20% off plus 10% off equal 30% off?
No. If the second discount applies to the reduced price, the total is 28%. A store that advertises "30% off" is offering something different from two stacked offers.
Why can the discount not be above 100%?
A 100% discount makes the item free. More than that would produce a negative price, so the calculator asks for a value between 0 and 100.
What if my sale price is higher than the original price?
That is a price increase, not a discount. Use the Percentage Increase Calculator to see the percentage change.
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Results are for general information only. The calculators are tested, but please double-check anything important before relying on it for financial, tax, legal or medical decisions.