Everyday Calculators
Discount calculator
Calculate the final price and discount amount, or recover an original price from the final price.
JavaScript is required to run the interactive tool. Open the tool separately if it does not load in the frame.
How to use it
Choose whether the entered amount is the original or final price, then enter a discount rate from 0 to 100%.
Example
Original 100 at 20% off gives a discount of 20 and a final price of 80.
Frequently asked question
Can I reverse a 100% discount?
No. A final price of zero at 100% off cannot determine the original price.
Limits and privacy
Prices must be nonnegative. Rates above 100% are rejected; recovering an original price from a 100% discount is undefined.
Tool input is processed in a separate browser environment without advertising or analytics scripts. This page does not upload it to the service.