Calculate the final checkout price after quantity, stacked discounts, a fixed coupon, sales tax or GST/VAT, shipping and free-shipping threshold.
Shopping and sales
Final checkout price
$0.00
Methodology
The calculator multiplies unit price by quantity, applies the first percentage discount, applies any stacked extra discount to the reduced amount, subtracts a fixed coupon, then adds tax and shipping where applicable.
Worked example
A 20% discount followed by an extra 10% discount is not a 30% discount. The second discount applies to the already-reduced price, and tax or shipping can change the final checkout total.
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Common questions
Stacked discounts are applied one after another, so the second percentage is calculated on a smaller amount.
Yes. Enter the quantity to calculate the subtotal, saving and final checkout estimate.
Yes. Use the tax field for a simple sales tax, GST or VAT estimate after discounts and coupons.
This is a retail math calculator. It does not enforce coupon restrictions, membership pricing, excluded products, minimum order rules, regional tax categories, currency conversion or marketplace-specific checkout logic. This calculator is for planning and education, not personal financial advice.