Discount Calculator
Calculate sale prices and savings with any discount percentage. See how much you save instantly.
How to Calculate Discounts
The discount formula is straightforward: Sale Price = Original Price × (1 - Discount%/100). For example, a $50 item with a 30% discount costs $50 × 0.70 = $35, saving you $15.
When shopping with sales tax, remember that tax is typically applied to the discounted price, not the original price. This means your total savings include the tax you would have paid on the discount amount. For calculating profit margins on discounted products, see our margin calculator. Need to figure out a percentage manually? We have that too.
Frequently Asked Questions
How do I calculate a discount?
Multiply the original price by the discount percentage, then divide by 100 to get the discount amount. Subtract this from the original price to get the sale price.
How do I calculate the original price from a sale price?
Divide the sale price by (1 - discount/100). For example, if an item is $64 after a 20% discount: original = $64 / 0.80 = $80.
How do stacking discounts work?
Stacking discounts are applied sequentially, not added together. A 20% discount followed by a 10% discount is NOT the same as 30% off. Example: $100 with 20% then 10% off = $100 × 0.80 × 0.90 = $72.