What is a Discount Calculator?
A Discount Calculator works out the final price after a percentage discount, how much you save, and the effective discount when two discounts are stacked.
An extra discount is applied to the already reduced price, so 50% plus 20% is not 70% off. The calculator shows the real combined discount.
How to use the Discount Calculator
- Enter original price.
- Enter discount.
- Tap Calculate to see the result.
- Tap Reset to clear the fields and try again.
Who should use it
- Shoppers checking sale prices
- Shop owners setting offers
- Anyone comparing deals
Key terms
- Original price
- The price before any discount.
- Extra discount
- A second discount applied after the first.
- Effective discount
- The total discount as one percentage.
Frequently asked questions
Is 50% + 20% the same as 70% off?
No. It is 60% off in total.
Is GST included?
Only if the price you enter includes GST.
Can I use this for flat discounts?
Convert the flat amount to a percentage first.
Is my data stored?
No.
Is my data stored?
No. Everything you enter stays in your browser and is cleared when you close the page.
Last updated: 1 November 2026