Discount Calculator
Compute final price and savings from a price and discount, or stack multiple discounts (e.g. 10% + extra 5%) — also reverse-engineer the discount rate.
How to Use
"Price → Final", "Final → Discount %", and "N+M (BOGO) per-unit" modes are available as tabs.
Enter price and percent (or final price). Use "+ Add" to stack additional discounts.
Final price, savings, and effective rate are shown together. Each value is copy-on-click.
FAQ
Is 10% + extra 5% just 15% off?
No — stacked discounts compound. 100 → 10% off → 90 → 5% off → 85.5. So the effective discount is 14.5%.
BOGO (1+1) vs 30% off — which is better?
Buy-one-get-one is effectively 50% off (two for the price of one). Use the "N+M" mode to compute the per-unit price and effective rate automatically.
Can I mix percent and flat-amount discounts?
Yes — "+ Add" supports both percent (%) and flat (currency) discounts; they apply in the order entered.
How is sales tax handled?
It isn't — confirm whether the listed price is tax-inclusive. In Korea, displayed prices typically include VAT.
Is anything sent to a server?
No. All computation runs in your browser.
