Black Friday Calculator
Calculate your total Black Friday savings and true cost after discounts, taxes, and shipping fees.
Formula
Final price = original × (1 − discount%) × (1 − coupon%) × (1 + tax%) + shipping
- Stack discounts are applied sequentially (not additively).
- A 40% off + 10% coupon = 46% total off (not 50%).
- Tax is applied after all discounts.
$299 item at 40% off + 10% coupon, 8.5% tax
Inputs
- Original Price: 299 $
- Discount Percentage: 40 %
- Additional Coupon Discount: 10 %
- Sales Tax Rate: 8.5 %
- Shipping Cost: 0 $
$299 → $179.40 (40% off) → $161.46 (10% coupon) + $13.72 tax = $175.18 total. Saved $137.54.
Frequently asked questions
How do stacked discounts work?
Each discount applies to the already-reduced price. 40% off + 10% off ≠ 50% — it is 46% total.
Is tax calculated before or after discounts?
Tax is applied to the discounted price (post-discount), not the original price.
What if shipping is free over a certain amount?
Set shipping to $0 if you qualify for free shipping with your order total.
Are Black Friday deals always the best prices?
Not always — compare with Cyber Monday and check historical price trackers before buying.