Free Discount Calculator
See the real sale price, including extra coupon discounts and sales tax.
How it works
- Enter the original price.
- Choose a percentage or fixed amount off and enter the discount.
- Add any extra coupon discount and sales tax if they apply.
- See the final price, how much you save and the true total discount.
Frequently asked questions
How do I calculate a percentage discount?
Multiply the price by the discount percentage and divide by 100 to get the amount saved, then subtract it from the price. For example, 25% off 80 is 80 × 25 / 100 = 20 off, so you pay 60.
Is 20% off plus an extra 10% off the same as 30% off?
No. The extra discount applies to the already reduced price, so 20% then 10% off 100 gives 72 — a total discount of 28%, not 30%. The calculator shows this effective discount.
Is sales tax applied before or after the discount?
In most places tax is charged on the discounted price, which is how this calculator works. Check your local rules for coupons and manufacturer rebates, which can be treated differently.
Can I work out the original price from a sale price?
Divide the sale price by (1 − discount / 100). For example, a sale price of 60 after 25% off came from 60 / 0.75 = 80.
Know the real price before you buy
"Extra 15% off already reduced prices!" sounds generous, but what do you actually pay? The discount calculator works out the sale price, how much you save and the true overall discount — including stacked coupons and sales tax.
How discounts are calculated
Sale price = original price × (1 − discount ÷ 100). With an extra discount, the second percentage applies to the already discounted price, not the original. Sales tax is then added to the final sale price.
Example
A jacket costs 120. With 30% off it is 84. An extra 10% coupon brings it to 75.60. That is a total saving of 44.40 — an effective 37% discount, not 40%. Add 8% sales tax and you pay 81.65.
Percentage or amount off
Switch to Amount off for deals like "10 off orders over 50". The calculator never lets the price go below zero, and it still shows the equivalent percentage so you can compare deals fairly.