Discount Calculator
Calculate a sale price, stacked discounts, tax, and your total savings before you buy.
Final total
$97.20
Price before tax
$90.00
You save
$30.00
Tax
$7.20
Final price: $90.00Tax: $7.20Savings: $30.00
Formula
Discounted price = original × (1−d₁) × (1−d₂)
Total = discounted price × (1+tax rate)
How it works
- 1
Enter the original price
Use the normal pre-sale price.
- 2
Add offers and tax
Enter the main discount, optional extra discount, and local tax rate.
- 3
Check the checkout total
Compare final cost, tax, and real savings before buying.
Common use cases
- Comparing sale offers
- Stacking store coupons
- Planning a shopping budget
- Checking tax at checkout
- Evaluating bulk discounts
- Confirming advertised savings
Frequently Asked Questions
- No. A 20% discount followed by 10% gives 28% off, not 30%.