Discount Calculator
Calculate the sale price after a percentage discount, how much you save, and the final price after tax.
Price and discount
You save:
Sale price:
Final price with tax:
How the sale price is calculated
Sale price = original price − (original price × discount %). If a tax rate is entered, it's applied to the discounted sale price, matching how sales tax is normally charged after any discount is deducted at checkout.
Frequently asked questions
Does stacking two discounts just add the percentages? No — successive discounts multiply rather than add. For example, 20% off followed by another 10% off is not 30% off overall; it's equivalent to about 28% off, since the second discount applies to the already-reduced price.
Is tax calculated before or after the discount? In most jurisdictions, sales tax is charged on the final discounted price, not the original price — which is how this calculator applies it.
How do I calculate the original price from a sale price and discount? Divide the sale price by (1 − discount %) — for example, a $75 sale price after a 25% discount implies an original price of $75 ÷ 0.75 = $100.