About the Discount Calculator
Sale signage advertising "25% off" or "buy one get one 50% off" can make it genuinely difficult to quickly judge the actual final price, especially once sales tax is factored back in on top of the discounted amount.
This calculator applies the discount percentage first, then adds sales tax to the discounted price (matching how most retailers calculate tax at checkout), giving a clear final price and total savings breakdown.
Frequently Asked Questions
Is sales tax calculated on the original price or the discounted price?
In most jurisdictions, sales tax is calculated on the discounted price, not the original price — this calculator follows that standard approach.
How do I calculate a stacked discount, like 20% off plus an extra 10%?
Apply each discount sequentially rather than adding the percentages together — 20% off followed by 10% off is not the same as 30% off, since the second discount applies to the already-reduced price.
Why is my in-store discount slightly different from this calculation?
Some retailers round differently or apply discounts before or after other promotions in a specific order — always check your final receipt against the advertised discount if the numbers seem off.