Discount Calculator
Enter the original price and discount percentage to calculate the sale price and how much you'll save. Optionally add sales tax for the final total.
Discount Calculator
Calculate sale price and savings
Sale price = original price × (1 − discount%). Savings = original price − sale price. Final total = sale price + tax.
How Discounts Are Calculated
Sale price = original price × (1 − discount percentage) Savings = original price − sale price Final total = sale price + (sale price × tax percentage)
**Stackable discounts**: If a store applies an additional % off the sale price, apply the second discount to the sale price (not the original). For example, 20% off then 10% off = 28% total off, not 30%.
**Sales tax**: Tax is applied to the discounted price, not the original price, in most jurisdictions.
- Sale price = original × (1 − discount%)
- Tax applied to discounted price
- Stackable discounts apply sequentially
- Supports any currency symbol
Worked Example
Example: $100 item, 20% off, 8% sales tax.
- Sale price = $100 × (1 − 0.20) = $80 - Savings = $100 − $80 = $20 - Tax = $80 × 0.08 = $6.40 - Final total = $80 + $6.40 = $86.40
📊 Source & data. Formula and default values reference U.S. Federal Trade Commission (FTC). Last verified 2026-10-29. Rates, brackets and fees change over time — all editable fields accept your own current values.
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Open calculator →Frequently Asked Questions
Is tax applied before or after the discount?
Sales tax is applied to the discounted (sale) price, not the original price, in most places. This calculator follows that standard.
Can I use this for any currency?
Yes. The math is the same regardless of currency — just enter numbers and interpret the result in your local currency.
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