Estimate final checkout price, total savings, effective discount percentage, and tax after one discount or a stacked extra discount.
$100 less 20% and 10% extra
This is checkout math only. It does not prove the advertised discount is valid, available to everyone, or free of required fees.
Calculate a sale price after a discount.
Check stacked coupon math.
Estimate tax after discounts.
Compare total savings before buying.
$75.60 final price, $28.00 savings before tax, and 28% effective discount
$56.00 final price and $24.00 savings
About $216.51 final price after $48.13 savings before tax
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Plain-language answers about when to use the estimate, what your numbers mean, what is left out, and how privacy works.
Use it when you want to test the exact inputs on this page: Calculate a sale price after a discount. Check stacked coupon math. The result is a check against your assumptions, not proof that a lender, tax app, broker, platform, or provider will use the same number.
Original price means the before-discount price shown on the tag, listing, or quote. Discount means the first percent off the original price. Extra discount means a second percent off the already-discounted subtotal, not the original price. Tax rate means optional tax added after the discounts. Leave it at 0 if you only want the pre-tax sale price.
No. A 20% discount and an extra 10% discount do not make 30% off. The second discount applies after the first one, so $100 becomes $80, then $72 before tax.
No. The calculator only checks math. Store rules, limited eligibility, fake reference prices, required fees, and coupon exclusions need to be checked on the offer page or receipt.
This calculator adds tax after discounts because that is the common checkout estimate. Actual tax rules can vary by place, item type, coupon type, and store policy.
In plain language: First subtotal = original price x (1 - discount percent). Stacked subtotal = first subtotal x (1 - extra discount percent). Tax is added after the discounts when a tax rate is entered. $100 with 20% off becomes $80. An extra 10% discount makes it $72. A 5% tax adds $3.60, so the final estimate is $75.60.
Read subtotal after discounts first, then total savings before tax, then tax amount, then final price. The effective discount shows the combined discount as one percent of the original price.
This is checkout math only. It does not verify coupon exclusions, membership rules, limited-quantity offers, shipping, refunds, store policy, advertised-price rules, tax exemptions, or local tax law. For legal, tax, or store-dispute questions, use the retailer terms, receipt, local tax rules, and official consumer-protection guidance instead of only this estimate.
Check the coupon terms, whether the discount applies before tax, whether shipping or fees are extra, and whether the original price is the real price you would otherwise pay.
No. The calculator runs in your browser tab. Recent answers stay only on the page while you use it, and they are not sent to a server.