Free Online Discount & Sale Price Calculator
Whether you are shopping for groceries, hunting for holiday clothing deals, or applying promo codes at an online checkout, our free discount calculator helps you find the exact final price and total savings instantly.
How to Calculate a Standard Percent Off Discount
Calculating the final sale price of a retail markdown involves a simple mathematical formula.
Formula: Original Price - (Original Price à Discount %) = Final Price
Example: A $50 shirt at 20% off.
$50 - ($50 Ã 0.20) = $40.
How Do Double Discounts (Stacked Coupons) Work?
Many department stores offer marketing promotions like "Take 20% off the clearance price, plus an extra 15% off at the register." Mathematically, this does not equal a total of 35% off.
- First, the initial 20% is subtracted from the original retail price.
- Then, the 15% is subtracted from that new, already reduced subtotal.
Our Advanced calculator mode handles this exact "stacked coupon" logic automatically to prevent costly shopping errors and show you the true markdown.
Frequently Asked Questions (FAQ)
Do you calculate the discount before or after sales tax?
Retail discounts and merchant coupons are almost universally applied to the pre-tax subtotal. State and local sales tax is then calculated based strictly on the final, discounted price of the item, which ultimately saves you money on taxes as well.