Free Online Discount Calculator
Stack percentage and fixed discounts, then add tax, to find the true final price.
Percent discounts are combined first (capped at 100%), then the fixed discount is subtracted, and finally tax is applied to the discounted subtotal.
What is Discount Calculator?
A discount calculator works out the final price of an item after one or more discounts and tax. When multiple percentage discounts apply, they are combined into a single percentage (capped at 100%), applied to the original price, then any fixed dollar discount is subtracted, and finally sales tax is added to the discounted subtotal. This matches how most retailers stack sale prices, coupons, and tax.
How to use it
- Enter the original price of the item.
- Add each percentage discount (for example, a store sale and a coupon).
- Optionally add a fixed dollar discount.
- Enter the sales tax rate to see the final price and your total savings.
Discount calculation order
Combined percent = min(100, sum of percentages). Discounted subtotal = originalPrice × (1 − combinedPercent ÷ 100) − fixedDiscount, floored at 0. Tax = discountedSubtotal × taxRate ÷ 100. Final price = discountedSubtotal + tax. Savings = originalPrice − discountedSubtotal.
Frequently asked questions
This calculator combines (adds) all percentage discounts first, capping the total at 100%, then applies that single percentage to the original price. This is the most common retail convention for stacked offers.
The combined percentage is capped at 100%, so the discounted subtotal never goes below zero. You simply pay nothing for the item before tax.
Sales tax is applied after all discounts, to the discounted subtotal. This matches how tax is charged at checkout in most regions.
The subtotal is floored at zero, so you never receive money back from a discount. The tax is then zero as well.
Yes. Leave the percentage fields at 0 for a fixed-only discount, or set the fixed discount to 0 for percentage-only savings.
Savings equals the original price minus the discounted subtotal (before tax). Tax is not counted as savings, since you still pay it.
Related calculators
Percentage Calculator
Find percentages, percentage change, and increases or decreases in seconds with clear formula breakdowns.
HealthBMI Calculator
Check your body mass index with metric or imperial units and see where you land on the healthy range.
EverydayAge Calculator
Calculate your exact age in years, months, and days, plus a countdown to your next birthday.
FinancialLoan Calculator
Estimate monthly payments, total interest, and view a full amortization schedule for your loan.