Discount and sale price calculator
Enter the original price and the discount to see what you will pay. Add a second discount or sales tax to see the true final price.
How the discount and sale price calculator works
A percentage discount is applied to the price at that moment. If a second discount comes after the first, it applies to the already reduced price, not the original. That is why two discounts never add up to quite the headline number.
Sales tax is normally added at the end, on the price after discounts. The calculator follows that order and shows each step.
The formula behind it
Price after discount = original × (1 - discount ÷ 100)
Two discounts: original × (1 - d₁) × (1 - d₂). Final price = that × (1 + tax rate).
A worked example
An $80 jacket is 25% off, and you have a 10% coupon. $80 × 0.75 = $60, then $60 × 0.90 = $54. That is 32.5% off, not 35%. Add 8% tax and you pay $58.32.
Questions people ask
Why is 25% plus 10% not 35% off?
The second discount is taken from the smaller, already discounted price, so it takes off less money than 10% of the original.
Is tax added before or after the discount?
In most places, tax is charged on the discounted price. Rules vary, so check your receipt.
How do I work out the original price from a sale price?
Divide the sale price by (1 - discount). A $60 price after 25% off was $60 ÷ 0.75 = $80.
Is a bigger percentage always a better deal?
Not always. 30% off a price that was recently raised may be no better than 10% off a fair price. Compare the final prices.