Discount Calculator
Find your final price after applying store discounts, stacked coupons, and local sales tax so you know what you pay at the till.
Calculate sale prices and savings from percentage discounts, double stacked coupons, and sales tax.
See also: Percentage Increase Calculator, VAT Calculator (UK), Proportion Calculator
How it is calculated
Discounted Price = Original Price × (1 − Discount% ÷ 100); Total Savings = Original Price − Final Price
Worked example: $100 Jacket on 40% Clearance with Extra 10% Coupon
$100 original tag price, 40% clearance discount, 10% coupon, 8% sales tax.
- Apply 40% primary discount: $100 × (1 − 0.40) = $60.00.
- Apply 10% coupon to discounted price: $60 × (1 − 0.10) = $54.00.
- Calculate total savings: $100 − $54 = $46 savings (effective 46% discount, not 50%).
- Add 8% sales tax: $54 × 1.08 = $58.32 final total.
Final price is $58.32, saving $46.00 off original retail.
How to Use This Calculator (Step-by-Step)
- Enter the tag or original sticker price.
- Specify the primary sale discount percentage.
- Add any secondary coupon or membership code percentage if stacking discounts.
- Enter your local sales tax rate to compute the exact checkout total.
Frequently asked questions
How do stacked discounts calculate?
Retailers apply each successive percentage discount to the already reduced subtotal, rather than summing the percentages together.
Is sales tax added before or after the discounts?
After. The worked example applies the 40% clearance discount and then the 10% coupon first, reaching 54 dollars, and only then adds 8% sales tax to reach a 58.32 dollar final total.
What happens if I enter a 100% discount?
A 100% discount reduces the price to zero before any coupon or tax step, because the discounted price is the original price multiplied by one minus the discount percentage. Any sales tax entered would then apply to that zero balance.
What is the difference between total savings and the final price?
Total savings are the original price minus the final price, while the final price is what you actually pay at the till after discounts and any sales tax. In the worked example the savings are 46 dollars and the final price is 58.32 dollars.
Do I have to enter a sales tax rate?
No. The sales tax field is optional, and it accepts zero, so you can leave it at zero if no sales tax applies and the result will simply be the discounted price after coupons.
Why is a 40% discount plus a 10% coupon not 50% off?
Each discount applies to the already reduced subtotal, not to the original price. In the worked example, 40% off 100 dollars leaves 60 dollars, and 10% off that 60 dollars leaves 54 dollars, which is an effective 46% discount, not 50%.