About the Discount Calculator
Find the final price after a discount and how much you save. Add a second stacked discount (like an extra 10% off sale items) and sales tax for the real checkout price.
Key features
- Final price and amount saved
- Stacked discounts (e.g. 30% + extra 10% off)
- Optional sales tax after the discount
- Effective total discount percentage
- Multiple currencies
- Results update as you type
Know exactly what you'll pay
Sales, coupons and "extra % off" promotions make it hard to tell what the final price will be. Enter the original price and the discount to see what you pay and what you save, including stacked discounts and sales tax.
Formulas
| Step | Formula |
|---|---|
| Savings | price × discount% ÷ 100 |
| Sale price | price × (1 − discount%) |
| Stacked discounts | price × (1 − d₁) × (1 − d₂) |
| With tax | sale price × (1 + tax%) |
Stacked discount examples
| Offer | Effective discount |
|---|---|
| 20% + extra 10% | 28% |
| 30% + extra 10% | 37% |
| 40% + extra 20% | 52% |
| 50% + extra 50% | 75% (not free!) |
Shopping tips
- Compare unit prices: a bigger discount on a smaller pack can still cost more per item.
- "Up to 70% off" usually applies to only a few items.
- Buy one, get one 50% off is a 25% discount across both items.
Related calculators
Add tax with the Sales Tax Calculator, or work out any percentage with the Percentage Calculator.
How to use the Discount Calculator
- Enter your numbers in the fields above. Units and options can be changed at any time.
- The result updates instantly as you type; there's no calculate button to press.
- Check the breakdown under the main result for the details behind the number.
- Adjust the inputs to compare scenarios, for example a different rate or term.