Know the real price of a sale before you get to the register, sales tax included.
How to calculate a discount
Sale price = original price × (1 − discount ÷ 100). 25% off $80 is $80 × 0.75 = $60, so you save $20.
Stacked discounts
"20% off plus an extra 10%" is not 30% off. The second discount applies to the already reduced price: $100 → $80 → $72, which is 28% off. Run the calculator twice to check.
Add the sales tax
In the US the tax is added at the register on the discounted price. Enter your local rate to see the final amount.
Frequently asked questions
How much is 30% off $50?
$35, you save $15.
Is the tax calculated before or after the discount?
After. You pay tax on the discounted price in most states.
How do I find the original price from the sale price?
Divide the sale price by (1 − discount). $60 at 25% off came from $60 ÷ 0.75 = $80.
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