Discount Calculator
Calculate sale prices and savings from a discount percentage
You Save
$20.00
Final Price
$80.00
How this was calculated
1. Discount 1: 20% off
Price x (1 - discount / 100)
Using price = $100.00; discount % = 20
Result: $80.00
2. Total saved
Original price - final price
Using original = $100.00; final = $80.00
Result: $20.00 (20% off)
Price after each discount
| Step | Discount | Price before | Amount off | Price after |
|---|---|---|---|---|
| 1 | 20% off | $100.00 | $20.00 | $80.00 |
Details
Price after one percentage discount = original x (1 - discount/100); a fixed amount is subtracted instead. A second discount is applied to the already reduced price, so the total off is 1 - (1 - d1/100)(1 - d2/100); 20% then 10% is 28%, not 30%. With a percentage and a fixed amount the order matters: on 100, 20% then 15 off is 65, but 15 off then 20% is 68. A discount that would take the price below 0 is refused. Tax is added on the discounted price. "Find the discount %" works backwards: (original - sale) / original x 100. Rounded to cents; estimate only.
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About Discount Calculator
Calculates the final price after one or two stacked discounts, each a percentage or a fixed amount like a $15 coupon (with optional sales tax or VAT), or works out what percentage discount was applied given an original and a sale price.
In "Price after discount" enter the original price and the discount, as a percentage or a fixed amount; add a second discount if the sale stacks, choose which is applied first, and add an optional tax rate. In "Find the discount %" enter the original and sale price to see the percentage off and the amount saved.
Stacked discounts are applied one after the other, not added: 20% off then 10% off is 28% off in total, not 30%. The result shows the effective percentage.
Watch: Discount Calculator in Action
- Do two stacked discounts add together?
- No — for stacked discounts (like 20% off, then an additional 10% off), apply them sequentially rather than adding the percentages together. 20% then 10% off isn't the same as 30% off in one step.
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