Discount Calculator
Final price after a discount — or the original price before it.CalculatorsDiscount Calculator
Work out the final price after a discount — or run it backwards from a sale price to find the original.
Price → final price
Sale price → original price
About this tool
Two directions in one place: price plus discount gives the final price and the saving; a sale price plus the advertised discount recovers what the item cost originally. Invalid inputs like a 150% discount are rejected with a clear message.
How to use the Discount Calculator tool
- Forward: price and discount. Enter the original price and discount percentage to see the final price and saving.
- Reverse: sale price and discount. Enter the sale price and the discount that was applied to recover the original price.
- Check the numbers. Both results update as you type and explain any invalid input.
Supported formats
Input
- A price and a discount percentage
- A sale price and a discount percentage
Output
- Final price and saving
- Recovered original price
Inputs are validated before anything is processed. Invalid values and unsupported files are rejected with a clear error instead of failing silently.
Frequently asked questions
How does the reverse calculation work?
The sale price is divided by (1 − discount), inverting the discount arithmetic exactly.
Can the discount exceed 100%?
No. Above 100% the maths stops making commercial sense and the tool reports it as invalid.
Are currency symbols handled?
Enter bare numbers; the tool does not apply any currency formatting.
Is tax included?
No. The calculation is pre-tax by design; apply your own tax rules afterwards.
Privacy
Everything you enter stays in this browser tab. There is no upload endpoint for tool inputs, no account, and no server-side copy of your text or files. Results are produced locally and disappear when you close the page.
No account is required and no file is ever uploaded. See the privacy policy for details about analytics and the limited data this site stores.
Known limitations
- No tax or multi-item cart handling.
- Two decimal places are shown without currency-specific rounding.
- Stacked discounts are not composed.
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Other free tools from the same collection.