What is the Double Discount Calculator?
Apply two successive discounts and see the real combined discount.
Enter original price, first discount and second discount and the Double Discount Calculator returns final price, combined discount and you save. Results update as you type, and nothing you enter leaves your device.
How it is calculated
Final = Price × (1 − a) × (1 − b)
Combined discount = 1 − (1 − a) × (1 − b)
How to use it
- Enter original price.
- Enter first discount in %.
- Enter second discount in %.
- Read final price in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Double Discount Calculator use?
It uses: Final = Price × (1 − a) × (1 − b); Combined discount = 1 − (1 − a) × (1 − b).
What do I need to use the Double Discount Calculator?
You need original price, first discount and second discount. Sensible starting values are filled in so you can see how it works straight away.
Is the Double Discount Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.