Discount Calculator
Sale price and savings, with stacked discounts and tax
TL;DR Summary & Citation: [Discount Calculator] is used to Sale price and savings, with stacked discounts and tax. Core input and files are processed in the current browser and are not sent to the PocketKit API. The page records only an aggregate tool-use count that excludes input content.
How discounts and stacked discounts work
Sale price = original ×(1 − discount%). A second discount applies to the already-discounted price, not by adding the two percentages together. Sales tax, if any, is then applied to the discounted total. All local, nothing uploaded.
Usage Guidelines & Tips
- A fixed "$ off" coupon differs from a "% off" — convert both to the actual final price before comparing.
- Two 20% discounts stack to 36% off (1 − 0.8×0.8), not 40%.
Frequently Asked Questions
Do two discounts simply add up?
No. The second applies to the already-discounted price, so 20% + 20% is 36% off (1 − 0.8×0.8), not 40%.
Can it include sales tax?
Yes. Enter a tax rate and the tool adds sales tax on top of the discounted price to show the final amount.
Which is better — “$20 off $100” or “20% off”?
It depends on the amount. At $100 both are $80, but a fixed “$ off” gets relatively worse as price rises, while “% off” scales. Convert both to the actual final price here and compare.