Discount calculator
The sale price, what you save, and the real discount when two are stacked.
Result
- Sale price
- $90.00
- Original price
- $120.00
- You save
- $30.00
How this was calculated
First discount
Price × (1 − discount ÷ 100)
$120.00 × (1 − 25/100) = $90.00
What this calculation assumes
- A second discount applies to the already reduced price, which is how stores usually stack them.
- Sales tax is charged on the discounted price.
The formula
Sale price = price × (1 − discount ÷ 100)
Example: 25% off $120 is $120 × 0.75 = $90; you save $30.
When a second discount is applied on top, it is taken off the already reduced price. 20% off and then a further 10% off is not 30% off: $100 becomes $80, then $72, a real discount of 28%. The calculator shows that real discount whenever you stack two.
Sales tax
Where sales tax applies, it is charged on the discounted price. Enter the tax rate to see the price you will actually pay at the till.
Questions people ask
How do I find the discount percentage from two prices?
Divide the amount saved by the original price and multiply by 100. From $80 to $60 is $20 ÷ $80 × 100 = 25% off. The percentage calculator does this in its percent change mode.
Is 50% off then 50% off free?
No. Half of a half is a quarter: you pay 25% of the original price, a 75% discount.