How to Calculate Discounts Correctly
Calculating a discount might seem simple, but when you factor in stackable coupons and sales tax, the math can get confusing. Our tool simplifies this by using professional retail accounting standards.
Stackable Discounts vs. Added Percentages
A common mistake is adding two percentages together (e.g., 20% + 10% = 30%). In reality, most retailers apply the second discount to the already reduced price. This is called a sequential discount.
[Image: Illustration showing a $100 item reduced to $80, then a 10% coupon taking it to $72, rather than $70]The Math Formula
Our calculator follows this workflow:
- Reduced Price: Original Price × (1 - Primary Discount)
- Coupon Price: Reduced Price × (1 - Additional Coupon)
- Final Price: Coupon Price × (1 + Tax Rate)
International Currency Support
Whether you are shopping on global platforms or traveling abroad, our tool supports multiple currencies including USD, INR, EUR, and more, providing localized formatting for accurate budgeting.