Find the sale price in seconds. This free discount calculator shows your final price, exactly how much you save, and the total with sales tax — for any percentage off.
Results update automatically as you type.
How the Discount Calculator Works
A discount calculator turns a percentage off into an actual dollar figure, so you know exactly what you'll pay before you check out. It takes your original price, applies the discount percentage, then layers on sales tax if you owe any.
Formula: Savings = P × (d ÷ 100); Sale Price = P − Savings; Final Price = Sale Price × (1 + t ÷ 100)
- P — the original price of the item before any discount
- d — the discount percentage, entered directly or picked from the 10% / 25% / 50% / 70% presets
- t — the sales tax percentage applied after the discount (optional; leave blank for 0%)
Example Scenarios
| Original Price | Discount | Sales Tax | Final Price |
|---|---|---|---|
| $100.00 | 10% | 0% | $90.00 |
| $250.00 | 25% | 0% | $187.50 |
| $500.00 | 50% | 8% | $270.00 |
| $80.00 | 20% | 7% | $68.48 |
| $1,000.00 | 30% | 0% | $700.00 |
How to Tell If a Deal Is Real with a Discount Calculator
A discount calculator gives the exact sale price, but whether the deal is good depends on the price you compare it with.
- Use the price the item usually sells for, not an inflated "was" price. Check a few retailers before entering the original price into the discount calculator.
- Include shipping and fees. A 25% discount with paid delivery can cost more than a smaller discount with free shipping.
- For two promotions in a row, apply them one after another: 30% off then 20% off leaves you paying 56% of the price, a 44% total discount.
Enter your local combined sales tax rate to see the total at the till. The discount calculator applies tax after the discount, which matches how most retailers charge it.
Multi-buy offers such as "buy two, get one free" work out to a 33% saving per item only if you want all three. Running each option through the discount calculator keeps comparisons honest. For background, see discounts and allowances on Wikipedia, then check your next purchase with the discount calculator.
Discount Calculator FAQ
How do I calculate a 25% discount on $80?
Multiply $80 by 25% to get $20 in savings, then subtract that from $80 to get a $60 sale price. Enter 80 as the original price and 25 as the discount percentage in the calculator and it does this instantly, plus adds tax if you owe any.Does the discount calculator include sales tax?
Yes. There's an optional sales tax field. If you fill it in, the calculator applies your local tax rate to the already-discounted sale price, not the original price, then shows that amount as your final price.How is the "you save" amount calculated?
Your savings is the original price multiplied by the discount percentage. It's calculated before tax is applied, so it reflects only the value knocked off by the discount itself, not any change in what you pay in tax.Can I use this for two discounts stacked on top of each other?
Not directly in one pass, but you can chain calculations. Enter the original price and the first discount to get a sale price, then re-enter that sale price as a new "original price" with the second discount percentage.What's the difference between percent off and a dollar discount amount?
Percent off scales with the price, while a dollar discount is fixed. If you only know the dollar amount saved, divide it by the original price and multiply by 100 to get the percentage to enter here.Does this calculator work for any currency?
Yes. The math is currency-agnostic — it just multiplies and subtracts based on the numbers you enter. Use whatever currency your original price is in, and the results will be in that same currency.Related Calculators
If you're comparing prices rather than working from one item, try the tool to compare unit prices across package sizes. Shoppers dealing with tax-inclusive pricing may also want to work out sales tax on a purchase separately, and if you're starting from two prices instead of a percentage, you can find the percent off between an original and sale price.