INTERACTIVE TOOL
Discount calculator
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How to use this tool
- Enter the original price.
- Add the first and optional second discount.
- Apply optional tax only when not already included.
Formula or method usedFinal price = original price × (1 − discount/100), applied successively when there are two discounts.
Worked example
Successive discounts of twenty and ten percent on 100 leave 72: an effective twenty-eight percent discount.
Assumptions and limits
Successive discounts multiply rather than add.
Frequently asked questions
Can tax be added after the discount?+
Yes. The form can apply an optional tax rate to the discounted price.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
Successive discounts multiply rather than add.