EXAMPLE
A $120 item at 30% off comes to $84.00.
Enter an original price to see results.
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How this calculator works
Store sales advertise a percentage off, but the actual dollar amount you save — and what you will pay with tax added — takes a couple of extra steps to work out by hand. This calculator does both: the sale price after the discount, and the final total once tax is added back in.
THE MATH BEHIND IT
You save: Original price × (Discount % ÷ 100)
Sale price: Original price − Amount saved
With tax: Sale price × (1 + Tax % ÷ 100)
A real example
A jacket is priced at $120, marked 30% off, in an area with 7% sales tax.
You save
$120 × 30% =$36.00
Sale price
$120 − $36 =$84.00
With 7% tax
$84 × 1.07 =$89.88
1.07 = 100% of the price, plus the 7% tax on top, combined into one multiplier.
Common questions
Tax is calculated on the discounted price, not the original price. This calculator applies the discount first, then tax on the reduced amount.
Apply them one at a time, not added together. A 20% sale plus a 10% coupon is not 30% off — it is 20% off first, then 10% off the new, already-reduced price.
The advertised discount may apply only to certain items, or tax and shipping may be added after the discount is calculated — the discount percentage and the final checkout total are two separate calculations.
The percentage stays the same, but the dollar savings scale with price — a 20% discount saves $10 on a $50 item and $100 on a $500 item.