Enter an original price and discount percentage to see the sale price and your savings — and add sales tax for the true final total.
A discount calculator answers two everyday questions instantly: what will I actually pay, and how much am I saving? It works for shoppers checking a sale, and for business owners setting promotions and confirming the margin impact of a markdown.
The sale price is Original Price × (1 − Discount% / 100). A $100 item at 25% off becomes $100 × 0.75 = $75, and you save $25. Add sales tax to the discounted price for the true out-the-door total: at an 8% tax rate, the $75 sale price becomes $81.
Multiple discounts do not simply add together. Taking 20% off and then another 10% off is not 30% off — it is 0.80 × 0.90 = 0.72, or 28% off the original. Each discount applies to the already-reduced price, so stacked percentages are always a little less than their sum.
Tip: For sellers, remember a discount comes straight out of margin. A 25% price cut on a product with a 40% margin leaves only a 20% margin. Know your margin before advertising a sale so promotions stay profitable.
In most places, sales tax is charged on the discounted price, not the original — so a genuine discount lowers both the price and the tax you pay. This calculator applies tax after the discount to show the real total. Enter zero tax if you only want the pre-tax sale price and savings.