About the Discount Calculator
Sale price and savings after a percentage discount, with optional extra discount and sales tax.
Also known as: percent off calculator, sale discount, discount price, how much is 20% off, discounted price.
How to use this calculator
- Enter original price, discount, sales tax (optional).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Sale price = price × (1 − discount)
Worked example
Using the values pre-filled in the calculator above:
- Original price = 80
- Discount = 25 %
- Sales tax (optional) = 0 %
the calculator returns:
- Sale price: 60
- You save: 20
- Price with tax: 60
Working
80 × (1 − 25%) = 60