Discount Calculator
Free Discount Calculator — find the sale price, percent off, and total savings for any discount. Handles % off, $ off, stacked deals, and sales tax. No signup.
About Discount Calculator
The Discount Calculator tells you exactly what you will pay and how much you save — in under a second. Enter the original price and the discount, and the tool returns the final sale price and total savings. Whether you are a shopper comparing deals at checkout, a retailer planning a markdown, or a business owner modeling the margin impact of a promotion, this calculator does the math instantly.
Discount math is deceptively tricky. A 25% discount on a $160 item is easy enough to calculate mentally — $40 off, final price $120. But stack a second 15% off coupon on top of that, and the math becomes less obvious. The stacked result is not simply 40% off the original price. The second discount applies to the already-reduced price of $120, saving another $18, for a final price of $102 — a total savings of $58 or 36.25% off the original. This tool calculates the correct result, not the misleading combined-percentage shortcut.
For shoppers, the calculator removes the mental arithmetic from sale events. Black Friday deals, outlet promotions, coupon stacking, and loyalty discounts all become immediately legible — you see the exact final price before you add anything to your cart.
For retailers and e-commerce managers, the tool is useful during promotion planning. Modeling the impact of different discount percentages on your margin lets you find the sweet spot between sales volume and profitability. Testing how a 20% off promotion compares to a fixed $20 off can reveal which is more appealing to customers at different price points while better protecting your margins.
Reverse calculation is also supported: if you know the sale price and the discount percentage, you can calculate what the original price was — useful for verifying whether a sale is genuinely discounted from the listed original.
Doing the math in your head
For most percentages you see on sale tags, you don’t actually need a tool. The 10% trick works for everything: find 10% of the price (move the decimal left one place), then scale. 25% off = 10% × 2 + half of 10%. 33% off = price ÷ 3. 75% off = price ÷ 4 is what you pay. For the full mental-math reference, the gotcha with stacked discounts, and how to handle sales tax correctly, see How to Calculate Percent Off.
Free, fast, and available on any device without signup.
Frequently asked questions
Enter the original price and the discount percentage (or dollar amount), and the calculator instantly shows you the final sale price and total savings. For mental math: 10% of the price is the decimal moved left one place — scale up or down from there.
Multiply the original price by the discount percentage divided by 100. For 25% off a $80 item: 80 × 0.25 = $20 off, leaving $60. The calculator handles this automatically — just enter the price and percentage.
The fastest mental trick: find 10% of the price (move the decimal), then scale. 10% of $89 is $8.90, so 30% off is $8.90 × 3 = $26.70 off. For 25% off, divide the price by 4. For 50% off, halve it.
Yes. The calculator applies each discount successively to the remaining price, which is how stacking actually works in stores. 20% off + 10% off is NOT 30% off — it's 28% off in total savings. This tool calculates the correct stacked result.