About the Discount Calculator
What is this?
A discount is a reduction from the original price of a good or service, commonly used in retail sales, promotions, and negotiations. Understanding how discounts work — and how multiple discounts combine — helps you judge whether a deal is genuinely good and avoid common pricing tricks that make discounts look larger than they are.
How it is calculated
To find the sale price, multiply the original price by (1 − discount percentage). For example, a 30% discount on 150 gives 150 × 0.70 = 105. To find the original price from a discounted one, divide the sale price by (1 − discount). Multiple successive discounts do not add — two 50% discounts give 75% off, not 100%.
Reference ranges
Frequently asked questions
Do multiple discounts add together?
No. Successive discounts multiply: a 20% discount followed by another 20% gives a total of 36% off, not 40%. Each discount applies to the already-reduced price.
What is the difference between a discount and a rebate?
A discount reduces the price at the point of sale. A rebate is a partial refund claimed after the purchase, often requiring you to submit proof of purchase to the manufacturer.
How can I tell if a sale is genuinely a good deal?
Track prices over time using price-history tools, compare across retailers, and watch for "was/now" pricing where the "was" price was only briefly inflated to make the discount look bigger.
Discount & Sale Calculator
Calculate sale prices, savings, and even stacked discounts (like "20% off, then extra 10% off").