Discount & Sales Calculator
Mastering Retail Math
During massive US shopping events like Black Friday, Cyber Monday, and back-to-school sales, retailers aggressively promote percentage discounts. Our Discount & Sales Calculator cuts through the marketing noise, showing you exactly what you will pay at the register and exactly how much cash you are saving.
How to Calculate Discounts Manually
If you don't have our calculator handy in a store, the easiest way to calculate a discount mentally is the "10% rule." Move the decimal point on the price one spot to the left to find 10%. For a 20% discount on a $45 item, 10% is $4.50. Double that to get $9.00 off.
Frequently Asked Questions
How do "stackable" discounts work?
If a store offers "20% off already reduced clearance items that are 50% off," you DO NOT get 70% off. You take 50% off the original price, and then take 20% off that new, lower price.
Does this include sales tax?
No. In the US, sales tax is almost always applied to the final discounted price, not the original sticker price. You can use our Sales Tax Calculator to find the ultimate checkout price.