Currency: USD
Enter all amounts in USD. Changing currency keeps numbers unchanged; no exchange rate is applied.
- Final price with tax
- $80.00
- Price before tax
- $80.00
- Savings before tax
- $20.00
How it works
Two percentage discounts do not simply add
A 20% discount followed by another 10% leaves 72 from an original 100, an effective 28% reduction. Run the second percentage on the first sale price; entering 30% would overstate the saving.
Checking the price before and after a discount
For an original price of 120, a 25% discount removes 30 and leaves 90. If you also enter a fixed discount of 10, this calculator applies it afterward, giving a final price of 80. Reversing the order would give 82.50, so check the promotion's terms before comparing the result with a checkout total. Use the known-pair mode when you know the sale price and need the original price or discount. The optional tax rate applies after the discounts; delivery charges are not included.
Calculate: formula and assumptions
Discounted price = original×(1−discount rate)−fixed discount.
Enter amounts in the same currency. Tax and commission rules can vary by contract and jurisdiction.
Discount from a selected known pair: formula and assumptions
Final = original − savings = original × (1−discount).
Fixed savings and percentage discounts are distinct inputs. A zero final price with 100% off cannot identify the original price.
Worked example
Reference example currency: USD. These fixed examples do not change with your calculator preferences.
Using the Calculate example:
- Original price ($)
- 100
- Percentage discount (%)
- 20
- Additional fixed discount ($)
- 0
- Sales tax after discount (%)
- 0
Discounted price = original×(1−discount rate)−fixed discount.
Example result
Final price with tax: $80.00
Price before tax: $80.00
Savings before tax: $20.00
These are illustrative inputs. Change the values to explore a different scenario.
Formula references
- Investor.gov: financial tools (opens in a new tab)
- OpenStax: discounts, markups and sales tax (opens in a new tab)
References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.
Common questions
In what order are a percentage and fixed discount applied?
The main calculation applies the percentage reduction first, then subtracts the fixed amount. The known-pair mode solves one discount relationship from the selected inputs.
Can a zero final price determine the original price?
At 100% off, every original price produces zero. That inverse case is indeterminate; a positive final price with 100% off is inconsistent.
Is sales tax included in the discounted price?
The optional tax field applies your entered rate to the price after the percentage and fixed discounts. It does not determine the applicable rate or the legal tax treatment of a coupon; delivery charges are not included.
Prepared by Finflo. See our methodology and editorial policy. Read the relevant professional-advice limitations.