Discount Calculator
Calculate discount amounts, sale prices, and total savings. Supports stacked (double) discounts for extra savings.
How to Use the Discount Calculator
Finding the sale price and savings is simple:
- Enter the original price — The regular price before any discounts.
- Enter the discount percentage — The percentage off being offered (e.g., 20% off).
- Optionally enter a second discount — For stacked/double discounts, enter the additional percentage. The second discount is applied to the already-reduced price.
- Click "Calculate" — See your savings amount, final price, and effective total discount percentage.
About Discount Calculations
Discounts are one of the most common everyday calculations. The basic formula is: Discount Amount = Original Price × Discount % / 100, and the Sale Price = Original Price - Discount Amount.
Stacked or double discounts occur when two or more percentage discounts are applied sequentially. Importantly, stacked discounts are not additive — a 20% discount followed by a 10% discount does not equal a 30% discount. Instead, the second discount applies to the already-reduced price. For example, $100 with 20% off becomes $80, and then 10% off $80 gives you $72, which is an effective total discount of 28%.
Understanding how discounts work is valuable for making smart purchasing decisions during sales events, comparing offers, and maximizing savings. This calculator handles both single and stacked discounts with instant results.
Frequently Asked Questions
Multiply the original price by the discount percentage and divide by 100 to get the discount amount. Then subtract that from the original price. For example, 25% off $80: Discount = $80 × 25 / 100 = $20. Sale price = $80 - $20 = $60.
A stacked (or double) discount is when two separate discounts are applied one after the other. The first discount reduces the original price, and the second discount is then applied to that reduced price. This results in a total discount that is less than simply adding the two percentages together.
No, they are not the same. 20% off followed by 10% off gives an effective discount of 28%, not 30%. On a $100 item: 20% off = $80, then 10% off $80 = $72. A straight 30% off $100 would be $70. The stacked discount saves you $28 instead of $30.
To find the original price, divide the sale price by (1 - discount/100). For example, if a sale price is $60 after a 25% discount: $60 / (1 - 0.25) = $60 / 0.75 = $80 original price.