Free Discount Calculator Online
Find the final price after any discount with this free discount calculator. Supports single discounts, stacked discounts, and sales tax so you know exactly what you pay before checkout.
Final Price
You save $25.00
How the Discount Calculator Works
Enter the original price and your discount percentage. The discount calculator subtracts the discount amount from the original price. If you have a second discount, it applies sequentially to the already-reduced price. Finally, sales tax is added to the discounted total. This mirrors how retail stores actually process discounts and taxes at the register. The discount calculator shows each step so there are no surprises at checkout.
Stacked Discounts Explained
A common mistake is adding discount percentages together. If a store offers 20% off plus an extra 10% off, most people expect 30% total. But the second discount applies to the already-reduced price: $100 becomes $80 after 20%, then $72 after another 10%. That is only 28% off. The discount calculator makes this clear by showing each step and the true effective discount rate.
Discount Formulas & Reference
| Formula | Example | Use Case |
|---|---|---|
| Price x (1 - D/100) | $100 x 0.75 = $75 | Single discount |
| P x (1-D1/100) x (1-D2/100) | $100 x 0.80 x 0.90 = $72 | Stacked discounts |
| Discounted x (1 + Tax/100) | $75 x 1.085 = $81.38 | Add sales tax |
| (Original - Final) / Original x 100 | ($100-$72)/$100 = 28% | Effective discount rate |
Frequently Asked Questions
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