Discount Calculator
Calculate the sale price after a discount. Find the final price, amount saved, and effective discount rate.
About Discount Calculator
A discount calculator determines the sale price of an item after applying a percentage or fixed discount. It shows you the amount saved, the final price, and can handle multiple stacked discounts (e.g., 20% off plus an additional 10% off). Understanding discount math helps you evaluate deals, compare prices, and make informed purchasing decisions during sales events like Black Friday, Cyber Monday, and seasonal clearances.
How to Use
Enter the original price and the discount percentage (or fixed amount). For multiple discounts, enter each discount one at a time — the calculator applies them sequentially (which is how most retailers calculate stacked discounts). You will see the final price, total savings, and effective overall discount rate. You can also calculate the original price from a sale price.
Formula / Key Equations
Single discount: Sale Price = Original Price × (1 - Discount%/100). Stacked discounts: Apply each discount sequentially to the running total. Original price from sale price: Original Price = Sale Price / (1 - Discount%/100). Savings = Original Price - Sale Price.
Common Use Cases
Shopping during sales events and comparing deals. Calculating final prices for online purchases with coupon codes. Budgeting for purchases with employee discounts. Comparing 'dollars off' versus 'percentage off' promotions to find the better deal. Calculating tax on discounted items.
Limitations
The calculator applies discounts sequentially, which is standard retail practice. It does not combine percentages additively (e.g., 20% + 10% off is NOT 30% off — it is 28% off when applied sequentially). Tax calculation is separate and not included unless you manually add it. The calculator handles numeric values and does not process currency symbols.
Frequently Asked Questions
How do stacked discounts work?
Stacked discounts are applied one after another to the running total, not added together. For example, 20% off followed by 10% off on a $100 item: first $100 × 0.80 = $80, then $80 × 0.90 = $72. The effective discount is 28%, not 30%.
Is it better to get $10 off or 10% off?
It depends on the original price. $10 off is better for items under $100, while 10% off is better for items over $100. At exactly $100, both give the same result ($90). Our calculator lets you compare both scenarios side by side.
How do I calculate the original price from a sale price?
Divide the sale price by (1 - discount percentage). For example, if an item costs $60 after a 25% discount: Original Price = $60 / (1 - 0.25) = $60 / 0.75 = $80.
Does the calculator include tax?
No, tax is calculated separately. To find the total with tax, first calculate the discounted price, then apply your local tax rate to that price.
Can I use this for buy-one-get-one (BOGO) deals?
This calculator handles percentage and fixed-amount discounts. For BOGO deals, the effective discount is 50% if both items cost the same. For different-priced items, the discount equals the price of the lower-priced item divided by the total.
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