Frequently Asked Questions
Everything you need to know about the Discount Calculator.
How does the discount calculator work?
Enter the original price and discount percentage; it shows your savings and the final price.
Is it free?
Completely free, no sign-up or limits.
Can it work backwards from the sale price?
Yes, the reverse mode finds the original price given a discounted price and the percentage applied.
What are stacked discounts?
Multiple discounts applied one after another (e.g. 20% then an extra 10%) — each discount applies to the already-reduced price, not the original, so the total savings is less than simply adding the percentages.
Why isn't 20% + 10% the same as 30% off?
Because the second discount applies to the price after the first discount, not the original price — the calculator shows this compounding step by step.
Does it show the calculation formula?
Yes, the formula and substituted values are shown for every mode.
Can I enter more than two stacked discounts?
Yes, add as many successive discount percentages as needed.
What if I enter a discount over 100%?
The calculator validates this and blocks the input with a clear message.
Is my data stored?
No; everything runs in your browser and isn't stored or sent.
Does it work on mobile?
Yes, fully responsive.