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How to use
Calculate a sale price after one discount or two successive discounts, with optional tax applied to the discounted amount. The second discount uses the remaining price, not the original price. For example, 25% off followed by a further 10% off produces an effective discount of 32.5%, not 35%. The tool separates each saving, the combined discount rate and the tax-inclusive total. Selecting a currency affects display only and never converts exchange rates.
- Enter the original price and choose the currency for display; this does not exchange the amount.
- Set the first discount rate and, if relevant, a second successive discount rate.
- Set optional tax charged after the discounts, or leave it at zero.
- Review the savings from each step, the effective combined rate and the final total; verify the retailer's offer conditions.
How it is calculated
Example
The default example starts with a price of 200 and 25% off, leaving 150 and a saving of 50 without extra discount or tax. Applying another 10% off reduces the remaining 150 by 15, leaving 135. Total savings are 65, an effective 32.5% discount on 200. With illustrative 15% tax on the discounted 135, tax is 20.25 and the final total is 155.25.
Important notes
The calculation assumes successive discounts and tax applied afterward; actual store promotions and local tax rules may use another order. Delivery charges, fixed fees, minimum-spend coupon rules and excluded items are not modeled. A 100% discount makes the discounted merchandise price zero but does not necessarily waive separate charges. Display rounding can differ from per-line rounding on a receipt.
Worked examples and interpreting results
A price of 200 with 20% off followed by an extra 10% becomes 144 before tax. The second discount uses the reduced price, so total savings are 28%, not 30%.
| Case | Calculation | Result |
|---|---|---|
| Price after both discounts | 200 × 0.8 × 0.9 | 144 |
| Total savings | 200 − 144 | 56 |
How to check the result
Set tax to zero for this example. Any entered tax applies after both discounts. Do not add successive discount rates directly.
Frequently asked questions
Is 25% off followed by 10% off the same as 35% off?
No. The second 10% comes off the already reduced price. An item priced at 200 becomes 150 and then 135, which is 32.5% off overall.
How do I add sales tax after a discount?
Apply the discounts first, then multiply the reduced price by 1 + tax rate ÷ 100. At 15% tax, 135 becomes 155.25.
Does changing currency convert my price?
No. The selector only changes the displayed currency symbol and number format. It does not fetch exchange rates or convert values.