Discount Calculator
Work out the sale price and how much you save, including stacked discounts like 20% off plus an extra 10%.
Final price
$160.00
- Original price
- $200.00
- You save
- $40.00
- Effective discount
- 20%
Price × (1 − Discount ÷ 100)
Frequently asked questions
How do I calculate a discount?
Multiply the price by (1 − discount ÷ 100). $200 with 20% off is $200 × 0.8 = $160, saving $40.
Is 20% off plus 10% off the same as 30% off?
No. Stacked discounts apply one after another: $100 × 0.8 × 0.9 = $72, which is 28% off, not 30%.
Is sales tax charged before or after a discount?
For store discounts, most states charge tax on the discounted price. Manufacturer coupons are often taxed on the original price — rules vary by state.